If you have thousands of cookbooks, you will probably have these cataloged using some software at home. I use Readerware and have used one of the user columns to store a LocationCode that helps me remember where the book is. I have multiple library locations in my home so knowing the room, bookcase and shelf is a tremendous help.
This can be a simple six-character string that only has meaning to the user. It can be displayed beside the book title on searches.