Bangkok Guidebook recomendation

Just finished (over the course of a long flight) easily the best city guide to Bangkok that I have come across. Its entitled "22 walks in Bangkok" by Kenneth Barrett and its available in Asia Books, which was where I bought it. It describes 22 walks through different areas of the city and is packed full of historical detail way beyond the superficial stuff that you get in most guides to this city. I learned a huge amount and reading it really got me fired up to visit some parts of the city that I had never thought of going to.