Anne Miller 
Mickey and the Trouble with Moles [PDF ebook] 

This is the second story following Mickey and her escapades in the extraordinary world of undercover animals! Disaster strikes when someone (or some thing . . .) robs a bank famed as the most secure bank in the world. There aren’t any signs of a break in — it’s as though the jewels from the vault simply vanished into thin air. An impossible crime? This sounds like a job for Mickey and the Animal Spies.