Can P.I. Butterfly save a birthday party gone bad? From mysterious disappearances to a house full of suspects, P.I. Butterfly must stop the Birthday Bandit before her younger brother's birthday is completely ruined!

First an "O" balloon goes missing, then a fistful of cake. When things start mysteriously disappearing at Toby's superhero birthday party, P.I. Butterfly flies into action. But with a party full of suspects, and a possible best friend betrayal, even her special butterfly wings might not help solve this case. Will P.I. Butterfly identify the Birthday Bandit before it's too late?

With a little bit of spunk and a whole lot of heart, P.I. Butterfly shows how action plus determination can solve any problem in this spirited mystery with a heartfelt surprise ending.

From the award-winning team of Karen Kilpatrick and Germán Blanco, this is the second book in the humorous and action-packed early graphic novel series for young readers who love fun, adventure, and mystery!