In Grk: Operation Tortoise, Tim discovers a well-guarded private island while vacationing in the Seychelles, where he learns of a devious plot that threatens the endangered local giant tortoise. Then, in Grk smells a rat, Tim and his dog Grk head off on another adventure--this time in India--where they face the infamous Blue Rat gang.

Previously published as two individual novels in 2007 and 2008.

Grk: Operation Tortoise --Grk smells a rat.