I'm learning Thai on my own and did not speak any Thai prior to learning to read. Some people may suggest learning basic conversation first, but I chose to start with learning the script. In doing so, I felt that I could quickly consult dictionaries and books without relying on transliteration, which frankly is super confusing to me. I'm really glad I found this book and gave it a try. In exactly 10 days, I managed to decipher most of the Thai script.
Days 1-5 are very simple. If you're a visual learner, I suggest inventing stories or associations for each letter in addition to rewriting them over and over. For example, my personal trick for พ: it looks like a paw and the sound is similar to "por" (just make sure to remember the circle on the correct side!)
Days 6-9: A lot of small details are presented with many exceptions. This is why after 10 days, I can read quite a bit of Thai (very slowly), but not everything. I haven't memorized all of these small details yet and frankly, I'm not sure I want to (it's rather daunting, maybe I'll eventually integrate them with constant exposure).
Day 10 is mostly a summary.
For Days 1-5, I liked how things were introduced in small bits. It made it possible to read and memorize the material in 1-3 hours every day. The author also provides some tips and tricks to memorize certain concepts. Personally, those were not always helpful for me. For example, there are some lenghthy passages on this "string theory" (cute name) to remember tones. I didn't really get that part to be honest. As a Vietnamese speaker, I instead relied on my own knowledge of tones and just learnt the rules by heart. But it's not to say that those tips and tricks won't help someone else and I appreciate that the author included them to cater to different types of learners.
I found Days 6-9 to be a bit rushed. For instance, we are told that there are different ways to read ร but we go over all those ways rather quickly with only a few examples for each. I actually would have preferred an entire day spent on just this, with many more examples.
Overall, I had a great time using this book/method. I can now read comments under youtube videos and short words here and there in movies, and look up words I don't know. I still find the stylized script difficult though.
For the audio, I just searched for "the name of the book + audio" online, no need to submit any forms.