A Course of Pure Mathematics (ISBN 0521720559) is a classic textbook in introductory mathematical analysis, written by G. H. Hardy. It is recommended for people studying calculus. First published in 1908, it went through ten editions (up to 1952) and several reprints. It is now out of copyright in UK and is downloadable from various internet web sites, free of charge including. It remains one of the most popular books on pure mathematics.