Told in alternating voices, twelve-year-olds JB Barnes and Sidney Miller meet aboard a scientific research ship after JB is tasked to invite a renowned scientist named Sidney Miller and mistakenly invites a girl with the same name who will do anything to get out of going to summer camp.

Twelve-year-old best friends and relatives, Julia and Eliza are happy to spend the summer together while Julia's mother is serving in the National Guard in Iraq but when they meet a neighborhood boy, their close relationship begins to change.

Struggling with her parent's divorce, Laura is unable to forget a boy she sees on a subway platform across from her, a photographer who is also wondering if he will ever see her again.

Eleven-year-old Ruby Danes has a real best friend for the first time ever, but agonizes over whether or not to tell her a secret she has never shared with anyone--that her mother has been in prison since Ruby was five--and over whether to express her anger to her mother.

"Joy Fonseca is dreading her 13th birthday, dreading being reminded again about her best friend Lukas's senseless death on this day, one year ago -- and dreading the fact he may have heard what she accidentally blurted to him the night before. Or maybe she's more worried he didn't hear. Either way, she's decided: she's going to finally open the first clue to their annual birthday scavenger hunt Lukas left for her the morning he died, hoping the rest...