Where can you send a letter to dav pilkey?

Oh, dude, if you want to send a letter to Dav Pilkey, the author of "Captain Underpants," you can try sending it to his publisher or literary agent. They'll probably know how to reach him, unless he's off on some epic adventure with Captain Underpants himself. Like, just make sure you use a lot of toilet humor in your letter to really get his attention!