Even though this book deals with a subject that intimidates a lot of people, maths, it is by no means overly complex. It is written in a very approachable manner and it is more about the theory of how to think, of how to adopt a more precise mode of thinking, than it is about algebra or any formulas. I would say perhaps the title of the book is not exactly accurate, since the author explains time and time again that even while employing a more mathematical thinking, maths isn't always right. But it helps one to be methodical and approach the problem logically.
It is quite an accessible book, but I would say that you can't be completely foreign to certain mathematical concepts to understand it. Audiobook might also not help you follow certain chapters very well, so consider another kind of copy.
Furthermore, I would say the book drags quite a bit and, unfortunately, can be quite boring and seem pointless at times. There are very interesting chapters, but others that, perhaps because of the audio version as well, I wanted to speed up. While he tries to link the topic to real world problems/applications, I feel that some parts were quite repetitive.

Nevertheless, if you're interested in a thorough overview on mathematical thinking, this might be for you! However, it is not a practical guide and will not exactly do what it states it can. You'll still be wrong plenty of times, sorry.