Category Theory Books

Abelian categories: an introduction to the theory of functors
by Peter Freyd, 1964, 192 pages, PDF

Abstract and Concrete Categories: The Joy of Cats
by Jiri Adamek, Horst Herrlich, George Strecker, 1990, 496 pages, 4.2MB, PDF

Banach Modules and Functors on Categories of Banach Spaces
by J. Cigler, V. Losert, P.W. Michor, 1979, 297 pp, 15 MB, PDF

Basic Category Theory
by Jaap van Oosten, 2007, 88 pages, 500KB, PDF

Basic Category Theory
by Tom Leinster, 2016, 191 pp, 1.3MB, PDF

Basic Concepts of Enriched Category Theory
by Max Kelly, 2005, 143 pages, 0.9MB, PDF

Categorical Homotopy Theory
by Emily Riehl, 2014, 292 pp, 1.4MB, PDF

Categories and Homological Algebra
by Pierre Schapira, 2011, 125 pp, 630KB, PDF

Categories and Modules
by Takahiro Kato, 2015, 323 pp, 2MB, PDF

Categories, Types, and Structures
by Andrea Asperti and Giuseppe Longo, 1991, 300 pages, PDF

Category Theory
Stanford Encyclopedia of Philosophy, 2007

Category Theory
Wikibooks, 2010

Category Theory: A Gentle Introduction
by Peter Smith, 2016, 283 pp, 1.4MB, PDF

Category Theory and Functional Programming
by Mikael Vejdemo-Johansson, 2012, 99 pp, 410KB, PDF

Category Theory for Computing Science
by Michael Barr, Charles Wells, 1998, 544 pp, 2.1MB, PDF

Category Theory for Programmers
by Bartosz Milewski, 2017, 510 pp, 12MB, PDF

Category Theory for Scientists
by David I. Spivak, 2013, 261 pp, 4.7MB, PDF

Category Theory for the Sciences
by David I. Spivak, 2014, 496 pp, online html

Category Theory in Context
by Emily Riehl, 2016, 258 pp, 1.3MB, PDF

Category Theory Lecture Notes
by Daniele Turi, 2001, 61 pages, 540KB, PDF

Category Theory Lecture Notes
by Michael Barr, Charles Wells, 1999, 133 pages, 1.2MB, PDF

Coherence in Linear Predicate Logic
by K. Dosen, Z. Petric, 2010, 51 pages, 410KB, PDF

Combinatorics and Algebra of Tensor Calculus
by Sen Hu, Xuexing Lu, Yu Ye, 2015, 88 pp, 860KB, PDF

Computational Category Theory
by D.E. Rydeheard and R.M. Burstall, 2001, 263 pages, 0.9MB, PDF

Dynamical Systems and Sheaves
by D. I. Spivak, C. Vasilakopoulou, P. Schultz, 2016, 65 pp, 610KB, PDF

Functors and Categories of Banach Spaces
by Peter W. Michor, 1978, 103 pp, 4.7MB, PDF

A Gentle Introduction to Category Theory: the calculational approach
by Maarten M. Fokkinga, 1994, 80 pages, 390KB, PDF

Higher Algebra
by Jacob Lurie , 2011, 950 pp, 4.8MB, PDF

Higher-Dimensional Categories: an illustrated guide book
by Eugenia Cheng, Aaron Lauda, 2004, 1.7MB, PDF

Higher Operads, Higher Categories
by Tom Leinster, 2003, 410 pages, 3MB, PDF

Higher Topos Theory
by Jacob Lurie, 2009, 943 pp, 3.9MB, PDF

Homotopy Theories and Model Categories
by W. G. Dwyer, J. Spalinski, 1995, 56 pages, 420KB, PDF

Introducing categories to the practicing physicist
by Bob Coecke, 2008, 30 pages, 280KB, PDF

Introduction to Categories and Categorical Logic
by Samson Abramsky, Nikos Tzevelekos, 2011, 101 pages, 710KB, PDF

An Introduction to Category Theory in Four Easy Movements
by A. Schalk, H. Simmons, 2005, 197 pages, 1.2MB, PDF

An Invitation to General Algebra and Universal Constructions
by George M. Bergman, 1998, 398 pages, PS

Lectures on Tensor Categories and Modular Functors
by Bojko Bakalov, Alexander Kirillov, 2000, PS

Metric spaces, generalized logic and closed categories
by F. W. Lawvere, 2002, 37 pages, 2.8MB, PDF

Model Categories and Simplicial Methods
by Paul Goerss, Kristen Schemmerhorn, 2004, 46 pages, 410KB, PDF

Notes on Categories and Groupoids
by P. J. Higgins, 1971, 195 pages, 14MB, PDF

Practical Foundations of Mathematics
by Paul Taylor, 1999

Seminar on Triples and Categorical Homology Theory
by B. Eckmann, 1969, 304 pages, PDF, PS, DVI

Seven Sketches in Compositionality: An Invitation to Applied Category Theory
by Brendan Fong, David I Spivak, 2018, 243 pp, 2.1MB, PDF

Tensor Categories
by P. Etingof, S. Gelaki, D. Nikshych, and V. Ostrik, 2009, 540KB, PDF

Toposes, Triples and Theories
by Michael Barr, Charles Wells, 2005, 303 pages, 1.3MB, PDF