Kill Joy by Holly Jackson

Pippa Fitz-Amobi is not in the mood for her friend’s murder mystery party. Especially one that involves 1920’s fancy dress and pretending that their town, Little Kilton, is an island called Joy. But when the game begins, Pip finds herself drawn into the make-believe world of intrigue, deception and murder.

But as Pip plays detective, teasing out the identity of the killer clue-by-clue, the murder of the fictional Reginald Remy isn’t the only case on her mind …