Stuart Robson has many years' experience teaching languages at various universities. He has written several books, including Instant Indonesian. Prateep Changchit is currently teaching Thai to the Australian Federal Police in Melbourne and has produced teaching kits for English teachers in Bangkok.
"This is a great book for beginners of the Thai language. You'll learn lots of valuable phrases in a way that can help you put them together in many different ways to get your thoughts across in a way that Thai people can understand. When learning Thai, the VERY first thing you should do is learn how to read. This is absolutely essential. Once you can read the Thai script, you'll always know how to say the words properly. You should then download Anki so you can throw all the phrases in there and use the flashcards to help you memorize what's in this book." -Goodreads