Culpepper's Cannon by Gary Paulsen

Adventures:
The Case of the Dirty Bird
    When Dunc Culpepper and his best friend, Amos Binder, first see the parrot in a pet store, they’re not impressed—it’s smelly, scruffy, and missing half its feathers. They’re only slightly impressed when they learn that the parrot speaks four languages, has outlived ten of its owners, and is probably 150 years old. But when the bird starts mouthing off about buried treasure, Dunc and Amos get pretty excited—let the amateur sleuthing begin!
Dunc’s Doll
    Dunc and his accident-prone friend, Amos, are up to their old sleuthing habits once again. This time they’re after a band of doll thieves! When a doll that once belonged to Charles Dickens’s daughter is stolen from an exhibition at the local mall, the two boys put on their detective gear and do some serious snooping. Will a vicious watchdog keep them from retrieving the valuable missing doll?
Dunc Gets Tweaked
    Best friends Dunc and Amos meet up with a new buddy named Lash when they enter the radical world of skateboard competition. When somebody “cops”—steals—Lash’s prototype skateboard, the boys are determined to get it back. After all, Lash is about to shoot for a totally rad world’s record! Along the way they learn a major lesson:
never
kiss a monkey!