Grk: Operation Tortoise is the best Grk book so far. The story is jam-packed with action and adventure as Tim tries to find out who needs help on the island of Calypso. Not only must he lie to his parents about still having a cold, he ends up stealing their boat and leaving them stranded on an island that they are forced to spend the night on with little food or water.
Why does Tim do these seemingly bad things? Not to hurt is parents, that's for sure. He does these things because of his insatiable curiosity and his need to set things right. I find it lucky that Tim's parents are able to take so may vacations. Last time they went to New York and this time they went to the Seychelles. I want to take vacation like that!
What I liked better about Grk: Operation Tortoise is that Max and Natascha were used a little more in the story, although they still weren't involved in the main adventure. I also liked the intense action and found the book to be quite thrilling. After all, how many twelve-year old boys get to drive a boat really fast across the ocean by themselves? Of course, Tim ends up smashing the boat into a palm tree up on the beach.
Now, that is quite exciting. And then he gets thrown into a cell with the threat of being experimented on by Goliath's scientists! How will Tim get himself out of this one? Plus, Grk has been taken away and isn't there to help him.
Overall, Grk: Operation Tortoise is an excellent story and the best Grk tale yet. I cannot wait to see what kind of trouble and boy and his dog get into next in Grk Smells a Rat. Atta boy, Grk!
I rated this book a 9 out of 10.