The Skull of Truth - Bruce Coville - Bog

Mr. Elives's magic shop is back, and this time it is on the other side of Tucker's Swamp. And Tucker's Swamp is where Charlie Eggleston heads to escape a beating-for lying. Charlie can't seem to keep from lying, though sometimes his lies are for a good cause. When Charlie stumbles into Mr. Elives's magic shop, his eyes light upon The Skull. Charlie steals The Skull and it puts him under some sort of spell-he can only tell the truth. Trouble is, now no one believes him. . . .