Zhao An Xin knows a lot a about strategy. He has selected the best of the best from the Chinese masters so that you don't have to look them up for yourself. All compiled in a handy and comfortable sized book, you can carry around and that's practical for study. All translations are very good, into plain, understandable English.
Once you've got Sun Tzu's Art of War, Sun Bin's Military Methods, and THIS book, you have completed your Chinese strategy library.
As a bonus, you get Zhao's mindmaps, that extract all the higher concepts from the treaties. The way Zhao studies and captures strategic wisdom is unique and a model to follow for all strategy scholars.