A Pig, a Fox, and a Fox by Jonathan Fenske
As in the precursors to this tale, A Pig, a Fox, and a Box and A Pig, a Fox, and Stinky Socks, Jonathan Fenske tells a humorous three-part story of two friends, Pig and Fox. In this book, Fox has a doll that looks like him, and he uses it to prank Pig into thinking it's the real Fox. As always, the mischief winds up backfiring, and Fox becomes his own victim.