As of 3.0.2, Blizzard has removed the demon trainers entirely from the game. Yeah! This project is, therefore, defunct.

Continuation of DemonTrainerFrame, updated for use with WoW 2.0.

Converts the merchant for warlock pets' books to a more friendly, trainer-style format.

Known Issues: 1. You MUST close the demon trainer window before trying to learn a grimoire you just purchased. Since the demon trainer is actually a vendor, clicking the grimoire with the trainer open will sell it back to the trainer rather than learn it. The original code blocked selling items to the demon trainer to prevent this; however, that code gives the dreaded "addon was blocked" error message. You can safely ignore this error message, close the trainer frame, then learn the new grimoires. I'm examining possible fixes.