9781514267981 | Createspace Independent Pub, June 8, 2015, cover price $10.95 | About this edition: Augustine, the man with upturned eye, with pen in the left hand, and a burning heart in the right (as he is usually represented), is a philosophical and theological genius of the first order, towering like a pyramid above his age, and looking down commandingly upon succeeding centuries.

9780559165269 | Bibliobazaar, October 30, 2008, cover price $26.99 | About this edition: This is a pre-1923 historical reproduction that was curated for quality.

9780559165245 | Bibliobazaar, October 30, 2008, cover price $22.75 | About this edition: This is a pre-1923 historical reproduction that was curated for quality.

9781409717256 | Lightning Source Inc, July 31, 2008, cover price $27.95 | About this edition: Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive.

9780548781807 | Kessinger Pub Co, November 30, 2007, cover price $22.95 | About this edition: This scarce antiquarian book is a facsimile reprint of the original.

9780470853207 | John Wiley & Sons Inc, May 1, 2004, cover price $78.10

9780470020470 | John Wiley & Sons Inc, July 30, 2004, cover price $60.00

9780881751796 | 3 sub edition (Computer Science Pr, June 1, 1987), cover price $30.95 | About this edition: This text should be useful both to novices and those with experience of programming in languages other than PASCAL.

9780716781271 | 3rd edition (W H Freeman & Co, June 1, 1987), cover price $30.95

9780130040787 | Prentice Hall, February 1, 1987, cover price $55.00