This classic text is rather unique in its class because of its comprehensive treatment of both real and complex analysis. The coverage is extensive enough for this text to serve well as the traditional, two semester PhD level class covering Lebesgue integration. This book could also serve as the basis for a two semester class at the MS level. The exposition is clear, rigorous, and detailed. The exercises are plentiful and thoughtful. This is one of the best written math books of all time.
