Leglocks: Enter The System by John Danaher

Great even if you understand

I think this is a great fit even if you already know a good amount of leg locks I’ve gone over this with my professor and there’s things that’s helped get better

leglocks, enter the system

incredible material as always

Excellent

This series by Mr. Danaher is a comprehensive introduction to the leg lock attack game. Everything is clearly explained, including the reasoning behind the techniques, philosophy, and mechanics of all aspects. For older folks like myself, it's an eye-opening view of the dangers and opportunities a hobbyist and professional has at their hands (or feet).