Thomas W. Judson’s *Abstract Algebra: Theory and Applications* is an open source textbook designed to teach the principles and theory of abstract algebra to college juniors and seniors in a rigorous manner. Its strengths include a wide range of exercises, both computational and theoretical, plus many nontrivial applications. Rob Beezer has contributed complementary material using the open source system, Sage.

The latest and most up-to-date version of *Abstract Algebra: Theory and Applications* can be found at HTML Edition. There is also a Runestone Version and a Spanish Language edition.

We recommend the online version in Runestone, since it contains working Sage cells and allows students to respond to reading questions directly in the textbook. The Runestone version of *Abstract Algebra: Theory and Applications* is updated weekly.

A nicely printed and bound (hardcover or paperback) copy of the 2023 Edition of AATA can be purchased at a reasonable priceâ€”about $18 for paperback edition and $25 for the hardbound edition (price at the start of the Fall 2023 semester). It is available at your favorite online retailer (Amazon or Barnes and Noble) or by special order from your local or college bookstore. This is a service provided by Lon Mitchell of Orthogonal Publishing. The author, while supportive of this edition, is not involved directly in any way, including financially. The ISBNs for the 2023 Edition are: 9781944325183 (paperback) and 9781944325190 (hardcover).

The first half of the book presents group theory, through the Sylow theorems, with enough material for a semester-long course. The second-half is suitable for a second semester and presents rings, integral domains, Boolean algebras, vector spaces, and fields, concluding with Galois Theory.

The book’s strengths include a wide range of exercises, both computational and theoretical, plus many nontrivial applications. Technology is integrated into the textbook using the open source system, Sage. In addition, there are reading questions and class activities in each section. Reading questions are intended to be completed prior to class. These questions provide an opportunity for students to familiarize themselves with the material before it is covered in class. Reading questions also allow the instructor a chance to modify a lesson according to the student responses.

- Full Text, 2023 edition (PDF, 1.6 MB, August 11, 2023) [Printable, Sage]
- Full Text, 2022 edition (PDF, 1.7 MB, July 28, 2022) [Printable]
- Full Text, 2021 edition (PDF, 2.2 MB, August 9, 2021) [Printable]
- Full Text, 2020 edition (PDF, 2.2 MB, July 30, 2020) [Printable]
- Full Text, 2019 edition (PDF, 2.2 MB, July 10, 2019) [Printable]
- Full Text, 2018 edition (PDF, 1.4 MB, August 1, 2018) [Printable]
- Full Text, 2017 edition (PDF, 1.4 MB, August 5, 2017) [Printable]
- Full Text, 2016 edition (PDF, 1.4 MB, August 9, 2016) [Printable]
- Full Text, 2015 edition (PDF, 1.4 MB, August 12, 2015) [Printable]
- Full Text, 2014 edition (PDF, 1.8 MB, August 15, 2014)
- Full Text, 2013 edition (PDF, 1.9 MB, August 16, 2013)
- Full Text, 2012 edition (PDF, 2.4 MB, August 11, 2012)
- Full Text, 2011 edition (PDF, 2.4 MB, August 10, 2011)
- Full Text, 2010 edition (PDF, 2.2 MB, August 27, 2010)
- Full Text, 2009 edition (PDF, 1.5 MB, February 14, 2009)

*Abstract Algebra: Theory and Applications* is written in PreTeXt. PreTeXt is an authoring and publishing system for authors of textbooks, research articles, and monographs, especially in STEM disciplines. Once a book has been written in PreTeXt different outputs can be produced such as PDF, HTML, EPUB, Jupyter Notebooks, and even braille. The PreTeXt source for *Abstract Algebra: Theory and Applications* is available at GitHub.