The idea is that you can skip to either the second or the third part and start working on becoming a Supple Leopard right away, but that reading the second part provides you with a picture of how to integrate the two systems. That's the idea, at least. Skipping to the second or third part more feels like visiting the old mobilityWOD site: you have a bunch of movements and mobilizations, and you know kind of which mobilization is supposed to improve which movement, but it's not really a system; or at least, it doesn't feel that way. I'd say it's pretty good, but to get the whole picture you really need to read the whole book.
The best way to progress at Brazilian jiu-jitsu is to supplement what you learn from your instructor by identifying your weaknesses and figuring out how to improve on them. Likewise, while massage therapists, chiropractors, and physiotherapists help keep your body happy, the people with the longest athletic careers are those who take a proactive approach. Cordoza and Starrett have made it easier for everyone to perform self maintenance. Get yourself a copy of Supple Leopard, set aside 20 minutes each day for the rest of your life, and enjoy smooth, pain-free motion for years (or decades?) longer than you deserve. 781b155fdc