Book 7: Pop!

Malcolm and Dandy have added a new gadget to their ghost hunting gear--XSpecs! These miraculous glasses are supposed to have Xray vision, but all they seem to do is hypnotize whoever looks at them. This comes in handy when the boys battle some vicious bubblegum that's snuck into their Halloween treats. But who's controlling the creeping confection? It'll take all of the ghost detecting tools to pop this case.