I thought it might be useful to learn how to play Texas Hold-em poker, and this book got good reviews on Amazon. It was very interesting, although it is probably better for people who actually have experience or talent at the game than it was for me.
I found it a bit advanced, with some nuances that I didn't quite get, and analytics that I'm not quite prepared to address at this point. Still and all, seems worth the price.
I'll probably read another in this space; that will give me a better comparison point.
