Like the other books by Victory Belt publishers, Marcelo Garcia's 'The X Guard' is fantastically detailed book covering the X guard and the butterfly guard positions. Initially I bought the book because of the Butterfly guard section, however Garcia's instructions of the X-Guard movements were so clear that when I tried them out with my training partner I was able to experience how efficient they were first hand. Now whenever I'm grappling and my opponent stands my first thought is 'Secure the X-Guard!'.