Sky is Everywhere (The) by Jandy Nelson
Lennie (named for John Lennon) is trying to recover from the sudden heart attack of her 19 year old super-star sister, Bailey. She is also falling for the new kid in school, Joe.
In trying to help Lennie and himself, Bailey’s boyfriend Troy, (they had agreed to be married) makes advances toward her. This natural effect of death leads both of them down a very guilt-ridden and ultimately destructive path, especially in the light of Lennie’s new found romance.
The main characters are believable, lovable, and quirky, as are Lennie’s grandmother and “Uncle Big.”
You will love this novel: just beware of language, underage drinking, and sexual exploration.