When Griffin found an old baseball card, he figured it would be worth a lot of money. A local collector gave him a little money for it and told him it was basically worthless. What do you think Griffin did when he found out that the guy swindled him out of some big bucks, that the card is really worth a million bucks? He got group of oddball sixth-grade friends together and made a plan to steal it back!
This book has some good description and interesting characters, and is a pleasure to read. It reminds me of Dan Gutman's The Homework Machine (a great story), except that this book has more characters, getting into a lot more trouble!
There is plenty of action, a good ending (though it could be better), and it will appeal to a wide arrange of readers.