Liam Saunders-Chang is one of the last humans left on Mars. The son of two scientists who have been racing against time to create technology vital to humanity's survival, Liam, along with his friend Phoebe, will be on the last starliner to depart before Mars, like Earth before it, is destroyed. Or so he thinks. Because before this day is over, Liam and Phoebe will make a series of profound discoveries about the nature of time and space and find out that the human race is just one of many in our universe locked in a dangerous struggle for survival.

Tally lives in a world where your 16th birthday brings aesthetic perfection: an operation that erases all your flaws, transforming you from an "Ugly" into a "Pretty". She is on the eve of this important event and cannot wait for her life to change. As well as guaranteeing supermodel looks, life as a Pretty seems to revolve around having a good time. But then she meets Shay, who is also 15 - but with a very different outlook on life.

Who you want people to be makes you blind to who they really are. It’s been a year since Billie Flanagan — a Berkeley mom with an enviable life — went on a solo hike in Desolation Wilderness and vanished from the trail. Her body was never found, just a shattered cellphone and a solitary hiking boot. Her husband and teenage daughter have been coping with Billie’s death the best they can: Jonathan drinks as he works on a loving memoir about his marriage; Olive grows remote, from both her father and her friends at the all-girls school she attends.

In 1948, an alien starship crash-landed in the New Mexico desert and brought with it the key to mankind’s future. Code-named the Rho Project, the landing was shrouded in secrecy, and only the highest-ranking US government and military personnel knew it existed. Until now....

Seventeen-year-old Cardinal has escaped the virus that ravaged his town, leaving its victims alive but without their memories. Choosing to remain in the quarantined zone, he cares for a group of orphaned kids in a mountain camp with the help of the former brutal school bully, now transformed by the virus into his best friend. But then a strong-willed and mysterious young woman appears, and the closed-off world Cardinal has created begins to crumble.

Jeremy is not excited about the prospect of spending the summer with his dad and his uncle in a seaside cabin in Oregon. It's the first summer after his parents' divorce, and he hasn't exactly been seeking alone time with his dad. He doesn't have a choice, though, so he goes...and on his first day takes a walk on the beach and finds himself intrigued by a boy his age running by. Eventually, he and Runner Boy (Evan) meet--and what starts out as friendship blooms into something neither boy is expecting... and also something both boys have been secretly hoping for.

Now: Sixteen-year-old Jesse is used to living with the echoes of the past. Her older brother died in the September 11th attacks, and her dad since has filled their home with anger and grief. When Jesse gets caught up with the wrong crowd, one momentary hate-fueled decision turns her life upside down. The only way to make amends is to face the past, starting Jesse on a journey that will reveal the truth about how her brother died. Then: In 2001, 16-year-old Alia is proud to be Muslim....it's being a teenager that she finds difficult.

Cruz Coronado leaves his tranquil home in Hawaii to join 23 talented kids from around the globe to train at the Explorer Academy with the world's leading scientists to become the next generation of great explorers. But for Cruz, there's more at stake. No sooner has he arrived at the Academy than he discovers that his family has a mysterious past with the organization that could jeopardize his future. In the midst of codebreaking and cool classes, new friends, and augmented reality expeditions, Cruz must tackle the biggest question of all: Who is out to get him, and why?

The first day at a new school is tough for any kid, but it's especially scary when you're going to a school for spies. Cammie Morgan has spent her whole life dreaming of becoming a Gallagher Girl, but she has no idea what she’ll face when she arrives at The Gallagher Academy for Exceptional Young Women. Secret passages? Check. Lab experiments that might make you lose your eyebrows (and other body parts)? Check. Classmates who are the smartest, strongest, most intimidating girls in the world? Double check.

Nothing can save Alex Sennefer's life. That's what all the doctors say, but his mother knows it's not true. She knows that the Lost Spells of the Egyptian Book of the Dead can crack open a door to the afterlife and pull her son back from the brink. But when she uses the spells, five evil ancients - the Death Walkers - are also brought back to life. An ancient evil has been unleashed. Mummies are awakening. New York is overrun with scorpions. And worst of all for Alex, his mom and the Lost Spells have both disappeared.

Jessa Whitworth knew she didn't belong in her ex-boyfriend Caleb's room. But she couldn't deny that she was everywhere - in his photos, his neatly folded T-shirts, even the butterfly necklace in his jeans pocket...the one she gave him for safekeeping on that day. His mother asked her to pack up his things - even though she blames Jessa for his accident. How could she say no? And maybe, just maybe, it will help her work through the guilt she feels about their final moments together.

This is a tale of missing persons. Madeleine and her mother have run away from their former life and settled in a rainy corner of Cambridge (in our world). Elliot, on the other hand, is in search of his father, who disappeared on the night his uncle was found dead. As Madeleine and Elliot move closer to unraveling their mysteries, they begin to exchange messages across worlds - through an accidental gap that hasn't appeared in centuries. But even greater mysteries are unfolding on both sides of the gap...

For Joshua Dread, middle school is proving to be, well, awkward. Not only do bullies pick on him, but do you see those supervillains over there trying to flood the world? The ones that everyone, including his best friend, Milton, are rooting for Captain Justice to take down? They're the Dread Duo, and they just happen to be his parents. As if trying to hide his identity wasn't hard enough, Joshua has started leaving a trail of exploding pencils and scorched handprints in his wake, and only Sophie, the new girl in town with a mysterious past, seems unsurprised.

Samantha yearns to shed the label of that girl whose mom died, but finding she can turn invisible isn't what she had in mind. Especially when she learns the neo-Nazi who killed her mom may be after her next. Sam's crush Will offers help and secrecy, but the time is coming when Sam will have to choose between keeping her secrets and keeping Will safe.

The Cahill family has a secret. For five hundred years, they have guarded the 39 Clues - thirty-nine ingredients in a serum that transforms whomever takes it into the most powerful person on earth. If the serum got into the wrong hands, the disaster would rock the world. So certain Cahills have always made it their mission to keep the serum safe, buried, locked away. Until now. Thirteen-year-old Dan Cahill and his older sister, Amy, are the latest guardians of the Clues. They think they've done everything right, but a tiny mistake leads to catastrophe.

Ricky Desmond has been through this all before. If he could just get through to his mother, he could convince her that he doesn't belong at Brookline. From the man who thinks he can fly to the woman who killed her husband, the other patients are nothing like him; all he did was lose his temper just a little bit, just the once. But when Ricky is selected by the sinister Warden Crawford for a very special program - a program that the warden claims will not cure him but perfect him - Ricky realizes that he may not be able to wait for his mom a second longer.

All of a sudden, the most ordinary things have taken on a sinister edge: a penny on a doormat. An odd man in a brown suit under a streetlamp. The persistent sound of an ax chopping in the middle of the night. He keeps telling himself that this is Seaham, a sleepy seaside town where nothing ever happens. Or at least nothing did, until his dad’s construction company opened up the cliff beneath the old—some say cursed—Langdon place.

Harrison Harrison - H2 to his mom - is a lonely teenager who's been terrified of the water ever since he was a toddler in California, when a huge sea creature capsized their boat, and his father vanished. One of the "sensitives" who are attuned to the supernatural world, Harrison, along with his mother, has just moved to the worst possible place for a boy like him.

Last spring, Nikki Beckett vanished, sucked into an underworld known as the Everneath. Now she’s returned - to her old life, her family, her boyfriend - before she’s banished back to the underworld... this time forever. She has six months before the Everneath comes to claim her, six months for good-byes she can’t find the words for, six months to find redemption, if it exists. Nikki longs to spend these precious months forgetting the Everneath and trying to reconnect with her boyfriend, Jack, the person most devastated by her disappearance - and the one person she loves more than anything.

Something happened that night in the woods at Camp Red Hawk. But all Joel and Leah can recall is sneaking out for a late hike with five camp friends and that only the two of them and their friend Mike returned. They have no memory of what happened to the others. No memory of anything after leaving the camp. In the years that follow, they realize something has changed inside of them. They are different from others in ways they never should be. In ways that send their lives down disturbing and terrifying paths.

16-year-old Mara Westray has just lost her mother, and now, being shipped off to live with the father she doesn’t know is not how she imagined grieving. She's already counting down the days until she turns 18 and can leave the tiny island of Swans Landing. But from the moment she steps off the ferry, nothing is as ordinary as it looks. As she tries to unravel the events that led to her mom fleeing the island 16 years ago, Mara finds that the biggest secret of all is only the beginning.

In this offering from Morris Award finalist Stephanie Oakes, three riveting points of view are woven together in a story that's part historical mystery, part contemporary coming-of-age, and completely unputdownable. When Molly gets a package leading her to Pepper, they're tasked with solving a decades-old mystery: find out who killed Ava back in 1989. Using Ava's diary for clues, Molly and Pepper realize there's more to her life - and death - than meets the eye. Someone is lying to them. And someone out there is guiding them along, desperate for answers.

The Forge School is the most prestigious arts school in the country. The secret to its success: every moment of the students' lives is televised as part of the insanely popular Forge Show, and the students' schedule includes twelve hours of induced sleep meant to enhance creativity. But when first-year student Rosie Sinclair skips her sleeping pill, she discovers there is something off about Forge. In fact, she suspects that there are sinister things going on deep below the reaches of the cameras in the school.

In this fast-paced survival story set in Hawaii, electronics fail worldwide, the islands become completely isolated, and a strange starscape fills the sky. Leilani and her father embark on a nightmare odyssey from Oahu to their home on the Big Island. Leilani's epilepsy holds a clue to the disaster, if only they can survive as the islands revert to earlier ways.

Now: Sixteen-year-old Jesse is used to living with the echoes of the past. Her older brother died in the September 11th attacks, and her dad since has filled their home with anger and grief. When Jesse gets caught up with the wrong crowd, one momentary hate-fueled decision turns her life upside down. The only way to make amends is to face the past, starting Jesse on a journey that will reveal the truth about how her brother died. Then: In 2001, 16-year-old Alia is proud to be Muslim....it's being a teenager that she finds difficult.

When her boyfriend dies a most untimely death, Aura--who can see ghosts--is forced to reconsider her relationship with the living and dead in Shade.

How do you let go of something you've never had? Junior year for Brooke Winters is supposed to be about change. She's transferring schools, starting fresh, and making plans for college so she can finally leave her hometown, her family, and her past behind. But all of her dreams are shattered one hot summer afternoon when her mother is arrested for killing Brooke's abusive father. No one really knows what happened that day, if it was premeditated or self-defense, whether it was right or wrong. And now Brooke and her siblings are on their own.

When Alexis's little sister Kasey becomes obsessed with an antique doll, Alexis thinks she is just being her usual weird self. Things get weirder, though, when their house starts changing. Doors open and close by themselves; water boils on the unlit stove; and an unplugged air conditioner blasts cold air.

One rainy day in Seattle, young software tycoon Micah Taylor receives a cryptic, 25-year-old letter from a great uncle he never knew. It claims a home awaits him on the Oregon coast that will turn his world inside out. Suspecting a prank, Micah arrives at Cannon Beach to discover a stunning, brand-new, 9,000-square-foot house. When bizarre things start happening there, locals tell cynical Micah the place is “spiritual”. But he will slowly discover the home isn’t just spiritual....

When Abbey’s best friend, Kristen, vanishes at the bridge near Sleepy Hollow Cemetery, everyone else is all too quick to accept that Kristen is dead, and rumors fly that her death was no accident. Abbey goes through the motions of mourning her best friend, but privately, she refuses to believe that Kristen is really gone. Then she meets Caspian, the gorgeous and mysterious boy who shows up out of nowhere at Kristen’s funeral, and who keeps reappearing in Abbey’s life. Caspian clearly has secrets of his own, but he’s the only person who makes Abbey feel normal again.