This page has a list of generally recommended books: What Are Some Good Memory Books to Read?
There’s a longer reading list in the blog.
If you haven’t seen them yet, you can also download our free ebook and some more free PDF books on memory training.
Yates’ book is great for a history of memory techniques in European culture. She doesn’t describe how to use the techniques though.
There are some links on this page that might be useful: How Do I Memorize a Book?