Swindle by Gordon Korman

Griffin spends the night in a haunted house on a dare and finds a Babe Ruth baseball card.  When he sells it, he later finds out that he was scammed.  The card is worth much more than he got when he sold it.  He hatches a plan to get the card back...but will dobermans and security alarms get in his way.  I loved this mystery!  -Mrs. Ekstrom


Amazon summary: Ocean's 11 . . . with 11-year-olds, in a super stand-alone heist caper from Gordon Korman!

After a mean collector named Swindle cons him out of his most valuable baseball card, Griffin Bing must put together a band of misfits to break into Swindle's compound and recapture the card. There are many things standing in their way -- a menacing guard dog, a high-tech security system, a very secret hiding place, and their inability to drive -- but Griffin and his team are going to get back what's rightfully his . . . even if hijinks ensue.
This is Gordon Korman at his crowd-pleasing best, perfect for readers who like to hoot, howl, and heist.