Penguin Publishing
Penguin Random House: Living Language: E Ticket Thai [Pdf]
These lessons will help you if you are planning a trip to Thailand and could use a helpful traveler's phrasebook with hundreds of essential words and phrases.
Penguin Publishing
Penguin Random House: Living Language: In Flight Thai Learn Before You Land [Pdf]
If you can master just the words and expressions given in these lessons then you will be able to get by in Tailand.