Have not read this yet, good reviews call it a wonderful writing and a slim quick read about friendship, grief, depression...compared to Kate DiCamillo...
Now I have read this and would generally agree with these statements.
Eddie (Edwina !?)and Sally (now it's the summer before 7th grade) have been best friends since the first day of second grade. Eddie is a list maker, habit checker, worrier. Her fond hope is to control life's unpredictables with lists and plans. This is mildly annoying to Sally, and when Sally's life truly spins out of control she really cannot cope with Eddie's attempts to tame the universe. Willie, who has cared for Sally all her life, because Sally's mom, a really nice person, just hasn't been able to, is now deathly ill and everything the girls have depended upon will change. This is their time to step up and be friends and be brave in an uncertain world.