Orthogonal Polynomials on the Unit Circle by Barry Simon (Caltech)
AMS Colloquium Publications, Volume 54
Part 1: Classical Theory (ISBN: 0-8218-3446-0)
Part 2: Spectral Theory (ISBN: 0-8218-3675-7)
To order from AMS:
Table of Contents
Sample Sections
Typos and Other Errors
New Sections Intended for the Second Edition