I wouldn't consider Pro JavaScript Techniques to be "The jQuery Memoirs" really at all. It only mentions libraries in passing. Whereas this book is much more in-depth and really breaks apart the fundamental aspects of a JavaScript DOM library in a way that developers can put into common use.
It may only mention libraries in passing, but I seemed to remember that many of the techniques were used in jQuery (where applicable). I don't mean any offense by relating that to memoirs; rather, it was very helpful to see many of your examples in real-life code that I was using every day -- and finally understanding both the how and the why.
Thanks for the reply, and good luck with the book! I do plan to check it out.