Eliot, it's not that big, maybe a couple hundred pages. Aside from the link Anna provided, I think you can also get a copy of it from somebody at the meeting (and not be charged a million dollars for it).
I suppose it sounds mystical because there is a Good Book for Christianity, and I probably used to have a problem with it for that reason. I read a lot of it several years ago and I wasn't that receptive to it. I have read passages from it more recently and it speaks to me in a very different way now. I think I am going to get a copy of it again.
I think you would like parts of it. Just guessing.
I notice you talk about yourself in the 3rd person a lot.
And also have different categories of yourself. you're not a perfectionist, are you? I do that sometimes too. I think it has to do with wanting to like myself more, not sure.