I thought Mastering the Rubber Guard, aside from the bizarre (if entertaining) introduction, was a very professional, well laid-out publication, especially the way the photos are methodical and from multiple angles. However, I would recommend leaving that until later (depending on where you are in your BJJ training), as I personally find the majority too advanced: I prefer to stick with fundamentals.
I think the three volumes from Ed Beneville are even better in terms of quality lay-out and photographic progression, so would recommend those above Bravo, particularly Strategic Guard. Beneville also give plenty of coverage to both fundamental and more advanced stuff, whereas with Bravo I felt there was only a very small portion that was applicable for beginners (although that's not really a criticism of the book, as there is nothing wrong with aiming your material at higher level grapplers).