I've learned basically everything about reading using this book, in roughly 20 days because I was a bit busy at times, but if you got the time, 10 days is very reasonable. I have been studying Thai for over a year, but never wanted to try learning to read after my experience with benjawan poomsan becker's book (if it worked for you great but definitely not for me with all the random upside down e's and incomplete o's)

This book makes everything so simple, like really really simple. like just ridiculously easy. I made a cheat sheet to help me out on the way, that got scrapped, updated and finalized. Basically sorting every long vowel, short vowel, consonant classes, random rules etc.

Just buy this one, stop looking. I was skeptical at first because read thai in 10 days sounds like a silly name, like someone could really learn an entire alphabet in 10 days? but yeah, you really can.
I'm so happy to learn from it.