Freaky Flyday (Ravenspell Book 3) by David Farland

Freaky Flyday, which is the 3rd book in the Ravenspell Book series by David Farland, is a fun story for middle grade readers. Ben Ravenspell, the boy turned into a mouse, is still in the process of recovering from his other adventures when he and his friends get word that an evil fly has been born, Belle Z. Bug, who wants to take over the world with her army of flies, made loyal to her by her evil pyramid scheme. Ben and his mouse friend Amber, as well as the shrew Lady Blackpool and Ben's human parents just want a short break when they come into contact with evil Belle Z. Bug's minions. Will they be able to get away? And how does a legendary toad warrior and his two minions affect the whole situation? Read the book and find out.