Book excerpt: John Patrick's Casino Poker is a book for anyone who has enjoyed a friendly game at home, yet wishes to test his skill against varied (and hitherto unknown) opponents. The book is not for the novice or the high-stakes professional. It is meant for the intermediate player, instructing him in the skills required to "know when to hold 'em and when to fold 'em", how to watch for "tells" in other players, and how to keep from offering a tell. The book concentrates on "reading" your opponents' play style as well as on self-discipline and money management.