This is book 1, in the A Costume Shop Mystery series.  Margo has returned home from Las Vegas to help out her dad at the family business, a costume shop.  Dad is having some health issues and Margo’s return home is just temporary until he is back on his feet again.  A local wealthy scion is looking to outdo all his friends with his birthday party and hires the costume shop and Margo’s friend to plan the party.  Unfortunately, the party ends with the guest of honor lying dead on the floor.

Dad takes off on an unauthorized trip costume hunting, Margo’s friend is the chief suspect, and Margo doesn’t really know what to think.  Feeling forced to investigate to clear everything up, Margo teams up with a couple locals Tak and Grady, although she is not quite sure of who she should trust.  Fast paced, fun cozy with an interesting theme and setting.