Doesn’t sound good to me. I can take Eskrido for a lifetime and never fully get BJJ. If i “skip around” a bit, I might practice and become proficient in take down defense or defending oneself in a full mount, but to know what it is like to roll for hours and become proficient on the ground takes dedication to that art. And vice versa.The book by Steven Pearlman addresses the underlying principles and mechanics of the human body and the martial arts. Once you recognize the underlying concepts it means you need not hop around, mixing and matching different parts from other arts. This book is worth its weight in gold to the martial artist who chooses to apply the lessons it shares.