Half-off Ragnarok - Seanan McGuire

When Alex Price agreed to go to Ohio to oversee a basilisk breeding program and assist in the recovery of his psychic cousin, he didn't expect people to start dropping dead. But bodies are cropping up at the zoo where he works, and his girlfriend--Shelby Tanner, an Australian zoologist with a fondness for big cats--is starting to get suspicious.

Worse yet, the bodies have all been turned partially to stone...

The third book in the InCryptid series takes us to a new location and a new member of the family, as Alex tries to balance life, work, and the strong desire not to become a piece of garden statuary. Old friends and new are on the scene, and danger lurks around every corner.

Of course, so do the talking mice.