Hi,
Since you prefer Szechuan, then I advise you look into:
Land of Plenty: A Treasury of Authentic Sichuan Cooking by Fuchsia Dunlop (Hardcover - June 2003)
I do not have this book, though it is on my list of things to acquire. I have heard her in radio interviews advise how she happened to be traveling through Szechuan and enrolled in a professional cooking school there. I have only read favorable reviews of this book.