Although I created this addon to demonstrate the usage of LibTextbook, I'm sure you'll find it useful.
Every time you open AH window a shopping list named Textbook:Recipes will be created. If you by any chance already have the list with that name IT WILL BE DELETED!
The addon scans Altoholic's data for all tradeskills your all characters on current realm (both factions!) have learned and compares them with the list of all non-BoP non-Common recipes that your characters can or will be able to learn. The recipes already in your bags, banks and mail are also taken in account.
It will work properly only with English clients.
Since Altoholic doesn't keep record about Tradeskill specialization I'm unable to implement the filter for it. This could be a problem only with Engineering, since other profession's specialty exclusive recipes are either trained or sold by a vendor. So, be careful not to buy Gnomish recipe for your Goblin Engineering character and otherwise.