A friend of mine Stephen Landau did a wonderful job translating this Thai masterpiece, A Man in Saffron Robes, a work by Maitree Limpichart.
Please check out reviews here.
The book review appeared in Journal of Siam Society.
As I wrote here, literary translation requires so much brain power to engage in such creative endeavor. I don’t believe that many Thai works are translated into English. Landau’s work is definitely a good place to start your collection.