Horseplayer444, welcome to The Rx. I hope you enjoy the site and become a regular poster. Choosing a new book that works for you is dependent on the type of player you are. Do you bet high, are you more of a smaller recreational type player, do you like bonuses, or would you rather get some reduced juice. Also the sports you play can be a factor. I assume you are a horse player right now you might want to give
Bodog a try - they have an excellent horse room.
Anyway give the posters here just a little more detail as to what you are looking for and you will get some more recommendations.
Best of luck, wilheim..