C.K.
There are actually two books I would recommend:
1) "Boundaries With Kids" by Dr. Henry Cloud & Dr. John Townsend
2) "Parenting the Strong-willed Child" by Rex Forehand, PH.D. & Nicholas Long, PH.D. This book is a clinically proven 5-week program for parents of two to six-year-olds. My daughter had very dramatic tantrums when she was two and this book helped me a lot.