This book was awesome, it focuses on Echo, younger sister to Zoe. (Their parents are college professors, can't you tell?) This book bears some comparison to 13 Reasons Why for it's themes. It deals with Echo and her family's grieving over the murder of Zoe. Echo receives Zoe's journal from Mark Zoe's much disliked boyfriend. As Echo reads Zoe's journal she discovers a side of Zoe she never knew & never will. This is definitely a book for older YA readers.