Well since you are talking about online I am not sure if this book will work... BUT..I gotta tell ya...this was and still is my bible for cash tables.
Unlike many other books about small stakes games, it teaches the aggressive and attacking style used by all professional players. However, it does not simply tell you to play aggressively; it shows you exactly how to make expert decisions through numerous clear and detailed examples.
It teaches you to think like a professional player. Topics include implied odds
, pot equity, speculative hands, position, the importance of being suited, hand categories, counting outs, evaluating the flop, large pots versus small pots, protecting your hand, betting for value on the river, and playing overcards. It also has over fifty hand quizzes that present you with common and critical hold ’em decisions. Choose your action, then compare it to the authors’ play and reasoning.
It is a good place to start if you are talking about your cash game...tournament games...Super System is probally the best I have read.