Ed Hines has recently released a eBook (PDF) suitable for all Gao style baguazhang enthusiasts. It serves as a great first stop for those already learning and goes into good details that will help those wanting a deeper understanding of the art.
Ed always writes with good humor and honesty, so it comes as no surprise that its also enjoyable as it is useful.
I just need a iPad2 to read it again on now!
The Ramsgate cohort salute you ED!