Eleven-year-old Kemi Carter loves scientific facts, specifically probability. It's how she understands the world and her place in it. Kemi knows her odds of being born were 1 in 5.5 trillion, and that the odds of her having the best family ever were even lower. Yet somehow, Kemi lucked out. But everything Kemi thought she knew changes when she sees an asteroid hover in the sky, casting a purple haze over her world. Amplus-68 has an 84.7% chance of colliding with earth in four days, and with that collision, Kemi’s life as she knows it will end.

Herc Beal knows who he's named after—a mythical hero—but he's no superhero. He's the smallest kid in his class. So when his homeroom teacher at his new middle school gives him the assignment of duplicating the mythical Hercules's amazing feats in real life, he's skeptical. After all, there are no Nemean Lions on Cape Cod—and not a single Hydra in sight.

Maudie always looks forward to the summers she spends in California with her dad. But this year, she must keep a troubling secret about her home life—one that her mom warned her never to tell. Maudie wants to confide in her dad about her stepdad's anger, but she’s scared. When a wildfire strikes, Maudie and her dad are forced to evacuate to the beach town where he grew up. It’s another turbulent wave of change. But now, every morning, from their camper, Maudie can see surfers bobbing in the water. She desperately wants to learn, but could she ever be brave enough?

Will is the only round kid in a school full of thin ones. So he hides…in baggy jeans and oversized hoodies, in the back row during class, and anywhere but the cafeteria during lunch. But shame isn’t the only feeling that dominates Will’s life. He’s also got a crush on a girl named Jules who he knows he doesn’t have a chance with, because of his size—but he can’t help wondering what if? Will’s best shot at attracting Jules’s attention is by slaying the Will Monster inside him by changing his eating habits and getting more exercise.

After Avalyn nearly died from an asthma attack, her parents moved her to the clear, dry air of Clear Canyon City, Arizona. And for the last ten years, she’s been able to breathe. That is, until Adam showed up. Quiet and unkempt, Adam is an instant target for the bullies who have plagued Avalyn and her friends. As Avalyn gets to know him, she begins to suspect that the sudden, strange increase in dust storms around town are somehow connected to his emotions.

Bell has spent his whole life—all eleven years of it—on Mars. But he's still just a regular kid—he loves cats and any kind of cake, and is curious about the secrets the adults in the US colony are keeping. Like, why don't they have contact with anyone on the other Mars colonies? Why are they so isolated? When a virus breaks out and the grown-ups all fall ill, Bell and the other children are the only ones who can help. It's up to Bell—a regular kid in a very different world—to uncover the truth and save his family...and possibly unite an entire planet.

Drew was never much of a runner. Until his dad’s unexpected diagnosis. Mia has nothing better to do. Until she realizes entering Half Moon Bay’s half-marathon could solve her family’s housing problems. And just like that they decide to spend their entire summer training to run 13.1 miles. Drew and Mia have very different reasons for running, but these two twelve year olds have one crucial thing in common (besides sharing a birthday): Hope. For the future. For their families. And for each other.

Bex and Davey's summer in the saltmarsh is different this year, thanks to the record-breaking drought. Even the fish seem listless - and each day the water level lowers farther. When they discover a mysterious underwater statue, they're thrilled at the chance to solve the puzzle of its origin. This is the summer adventure they've been waiting for. When they learn of a development plan that will destroy their special spot, they'll need to act quickly. Unfortunately, sometimes progress happens whether you're ready or not.

For most of her life, Lacey has been a prisoner without even realizing it. Her dad rarely let her, her little sister, or her mama out of his sight. But their situation changes suddenly and dramatically the day her grandparents arrive to help them leave. It’s the beginning of a different kind of life for Lacey, and at first she has a hard time letting go of her dad’s rules. Gradually though, his hold on her lessens, and her days become filled with choices she’s never had before.

A long-ago “accident”. An isolated girl named Aviva. A community that wants to help but doesn’t know how. And a ghostly dybbuk that no one but Aviva can see, causing mayhem and mischief that everyone blames on her.

When Mac first opens his classroom copy of Jane Yolen's The Devil's Arithmetic and finds some words blacked out, he thinks it must be a mistake. But then when he and his friends discover what the missing words are, he's outraged. Someone in his school is trying to prevent kids from reading the full story. But who? Even though his unreliable dad tells him to not get so emotional about a book (or anything else), Mac has been raised by his mom and grandad to call out things that are wrong.

Hannah and Finn have spent every Christmas together since college. Neither has anywhere else to go—Hannah’s parents died, and Finn’s disowned him when he came out. Their tradition of offbeat holiday adventures only grows more outrageous with time. When the pair starts their adult lives in New York City, they add stylish Priya and mysterious Theo to the group, solidifying a found family and sense of belonging they’ve always craved.

Twelve-year-old Nova is eagerly awaiting the launch of the space shuttle Challenger - it's the first time a teacher is going into space, and kids across America will watch the event on live TV in their classrooms. Nova and her big sister, Bridget, share a love of astronomy and the space program. They planned to watch the launch together. But Bridget has disappeared, and Nova is in a new foster home. While foster families and teachers dismiss Nova as severely autistic and nonverbal, Bridget understands how intelligent and special Nova is, and all that she can't express.

At eight years old, Tuesday Storm's childhood is forever lost when the death of her older sister Audrey sends her family spiraling out of control into the darkest of dysfunction. In the wake of the tragedy, Tuesday's mother, distraught and looking for a scapegoat, singles Tuesday out from her siblings to take on the blame for Audrey's death, and then targets her for unspeakable abuse.

Makeda June Kirkland is eleven-years-old, adopted, and black. Her parents and big sister are white, and even though she loves her family very much, Makeda often feels left out. When Makeda's family moves from Maryland to New Mexico, she leaves behind her best friend, Lena - the only other adopted black girl she knows - for a new life. In New Mexico, everything is different. At home, Makeda's sister is too cool to hang out with her anymore and at school, she can't seem to find one real friend.