The power potion

Dave Sanchez (aka The Gecko) and his pet gecko (aka Sticky) are back in their fourth dangerous encounter with the dastardly treasure hunter Damien Black!Thirteen-year-old Dave Sanchez is a daytime student, an after-school courier . . . and a secret superhero! So far Dave's been able to juggle his different roles. But in Dave's hands is the scariest package he's ever been asked to deliver. It's a tube, sealed on each end with wax, and addressed to . . . Damien Black. Holy tacarole! He can't just hand over a package to the most devious criminal in the city! Who knows what's in there?So Dave…