I haven't started reading this book yet, but it looks like it's got a lot of information about gambling around Fort Worth. It was published in 1998 and can be ordered through Amazon, but you might get a copy faster by buying a used one from somebody. Amazon says "ships in 4 to 6 weeks" for a new one.

It's about 200 pages long, has some photographs and a lot of names of people and places. I made scans of the index below so you can get an idea of what's in the book.