Astrom and Wittenmark, Adaptive Control, Addison Wesley, 2nd Ed., 1995
Goodwin and Sin, Adaptive Filtering Prediction and Control, Prentice Hall, 1984
Sastry and Bodson, Adaptive Control: Stability, Convergence, and Robustness, Prentice Hall, 1989. (Book can be downloaded from http://www.ece.utah.edu/~bodson/acscr/)
Krstic, Kanellakopoulos, and Kokotovic, Nonlinear and Adaptive Control Design, Willey