This list is produced from an original Excel file located that lists the 1000 most common words per Thai book. I have collated the 4 lists into one list and ordered the words accordingly to their summed appearence. As you can see this leads to more than 1000 words as each book does not include the same words when dealing with words of rare occurance.

There are 1 or 2 minor anomolies where there was bad data in the orignal Excel file, however these are few and do not detract from the overall list.