Introductory Real Analysis是1975年版的，现在还是上real analysis课时用的参考书，真的可以称得上是经典。在amazon上也不贵，最低价$1.93，反而运费比书的价格还贵

Self-contained and comprehensive, this elementary introduction to real and functional analysis is readily accessible to those with background in advanced calculus. It covers basic concepts and introductory principles in set theory, metric spaces, topological and linear spaces, linear functionals and linear operators, and much more. 350 problems. 1970 edition.

• Paperback: 416 pages
• Publisher: Dover Publications; 1st edition (June 1, 1975)
• Language: English
• ISBN-10: 0486612260
• ISBN-13: 978-0486612263