Charles Hadfield has worked as a teacher and trainer, administrator, and consultant in many places including Madagascar, Tibet, China, and France, with shorter visits to many African countries, most of Europe, and Japan. He often collaborates with his wife Jill on education projects as colleague and co-author. He studied at Southampton, London, and Bordeaux, and is currently teacher-training coordinator at the English Language Academy at the University of Auckland, NZ.
This is written by one of the best ESL teachers who ever lived! Actually, 2 ESL teachers! Charles & Jill Hadfield taught in China in the early 80s, and captured the dragon about to transform into a modern global superpower. I imagine their book as an early blog, and I highly recommend all Jill's ESL teaching books, if you can find them! (most are out of print, and expensive!)