Book 1

Beware of the Dog

by Bob Balaban

Published 1 August 2002

Book 1

Beware of Dog

by Bob Balaban

Published 1 August 2002

Book 2

It's a Dog's Life

by Bob Balaban

Published 1 March 2003

Book 3

Every Dog Has His Day

by Bob Balaban

Published 1 September 2003
Thomas and his bionic best friend, McGrowl, suspect that the leaders of a school nature trip are actually an evil duo from the past.

Book 4

Good Dog!

by Bob Balaban

Published 1 March 2004

Book 4

McGrowl #4

by Bob Balaban

Published 1 March 2004
"When a heroic deed lands McGrowl in the local newspaper, his original owner, Edwina Tuttle, spots her former pet -- and invites McGrowl to her house for a visit. So Thomas and McGrowl set off on an exciting journey to see Edwina. But their trip becomes a wild-goose chase. The mastermind behind it all may be the evil Milton Smudge. And this time, he's determined to trap McGrowl ... no matter what it takes!"--P. [4] of cover.

Book 5

It's a Dog-Eat-Dog World

by Bob Balaban

Published 1 September 2004

Book 6

Puppy Tales

by Bob Balaban

Published 1 January 2005