When she suspects that her father has a girlfriend, Melody and her best friend are determined to figure out who it is and why it is a secret.

Homeschooled by her mechanic-environmentalist father, eleven-year-old Rachel "Ratchet" Vance records her efforts to make friends, save a park, remember her mother, and find her own definition of "normal."

"Amelia Albright dreams about going to Florida for spring break like everyone else in her class, but her father--a cranky and stubborn English professor--has decided Florida is too much adventure. Now Amelia is stuck at home with him and her babysitter, the beloved Mrs. O'Brien. The week ahead promises to be boring, until Amelia meets Casey at her neighborhood art studio. Amelia has never been friends with a boy before, and the experience is both...

On a cold winter day in Chicago, Early's father disappeared, and now she, her mother and her brother have been forced to flee their apartment and join the ranks of the homeless--and it is up to Early to hold her family together and solve the mystery surrounding her father.

It is 1943, and 11-year-old Dewey Kerrigan is traveling west on a train to live with her scientist father--but no one will tell her exactly where he is. When she reaches Los Alamos, New Mexico, she learns why: he's working on a top secret government program.

Selkie Bay is a place where the old legends seem very near, and eleven-year-old Cordelia believes that her secretive mother is a selkie who has returned to the sea--a belief that offers some hope as she struggles to care for her two younger sisters and help her scientist father makes ends meet in their home by the sea.

Twin girls Sarit and Allie have always been coached in basketball by their father, but now that their parents are divorced and he has moved away, Sarit is unhappy playing on the school team, and resentful that her sister still enjoys the game.

Harassed at her middle school, not taken seriously at home, and with a "perfect" older brother, Matthew, to live up to, thirteen-year-old Claire has always felt like her life was cursed--then one morning, when she are her beloved father are talking at breakfast, her father suddenly falls over with a stroke, and suddenly everything changes.

Determined to prove her conspiracy theorist father's beliefs about lost Cold War technology, Gillian, her skeptical brother, and their friends journey to the ruins of a vast doomsday bunker before they are confronted by dangerous adversaries.