Hi Ariel,
The Encyclopedia of Rawhide and Leather Braiding is quite complete. It has a lot of knots and braids in it. However, I find that the drawings can be misleading and hard to understand sometimes.
Don't know about the other book, never seen it.
I don't know if you're just starting braiding or not, but if you're beginning, I'd suggest getting a copy of "The Art of Braiding, Basics - Revised Edition" by Gail Hought. Not as many knots as in the Encyclopedia but her instructions and pictures are clear and easy to understand. She has other books too but they're for specific projects. Here's a link to them: http://www.hought.com/brbooks.html.
Hope that helps!
And welcome to the forum!
Myriam