Book 1

The Black Paw

by Heather Vogel Frederick

Published 21 June 2005
Two fifth-graders who are the targets of bullies and a mouse spy who has not only lost her job but is also on a mobster rat's hit list, meet at Washington D.C.'s International Spy Museum and go under cover to help each other out.

Book 2

For Your Paws Only

by Heather Vogel Frederick

Published 4 October 2005
When the infamous and formerly illiterate rat leader Roquefort Dupont is found reading a book at the Library of Congress, the mice fear that their future is bleak.

Book 3

Goldwhiskers

by Heather Vogel Frederick

Published 1 January 2007
Winter break is off to an exciting start with Oz and D.B. jetting off to London for Oz℗£s mom℗£s opera premiere. And Glory Goldenleaf, private eye, comes along for a pleasure trip. But this jolly holiday winds up being anything but when Goldwhiskers, the richest rat in the entire world, is discovered enslaving the orphan mice of Great Britain to do his thievery. And when the Crown Jewels are stolen, Oz, D.B., and Glory are in store for a James-Bond-meets-Scotland-Yard kind of mission the likes of which the spy world has never seen!