Paper Valentine by Brenna Yovanoff

(Love this cover!)

Hannah is just trying to get through the summer, one of the hottest on record.  She wants to be a happy, normal girl doing normal things... but that's kind of hard when she is consistently haunted by the ghost of her best friend, Lillian, and there's a serial killer loose in her home town requiring her to chaperone her sister, Ariel, and her friend, to and from summer school.
Lillian self-destructed, letting herself die bit by bit by not eating. Trying to be the perfect, popular girl. She and Hannah were inseparable, friends from childhood, the leaders and trend setters of their group of girls. Now Hannah doesn't know who she is anymore, and why is she suddenly noticing Finny Boone, a tall, muscular boy with bleached blonde hair and a penchant for petty theft and a reputation as a delinquent and a loser... but is there something more to him than those easy labels?
This is a book that grips you right from the start. It's a stay up all night reading till the end kind of story. The Recommender hasn't read one of  Brenna Yovanoff's books before but I am going to be sure to check out her other titles because she is a wonderful writer and Hannah is someone  you care about and want to spend time with as she tries to understand the secret of the Paper Valentine killer as well as what made Lillian want to die... and was she partly to blame? I won't give away any more of the story because this is a book you'll want to lose yourself in and uncover the mysteries of the hot, hot summer of murder, friendship, love and loss.