Elementary Algebra & Trigonometry
Abstract Algebra
Mathematical Analysis & Calculus
Differential Equations
Linear Algebra
Geometry & Topology
Mathematical Logic
Category Theory
Number Theory
Probability & Statistics
Computational Mathematics
Applied Mathematics & Mathematical Physics
History of Mathematics & Popular Books
Algebraic and Geometric Methods in Enumerative Combinatorics
by Federico Ardila, 2014, 143 pp, 1.8MB, PDF
Analytic Combinatorics
by Philippe Flajolet, Robert Sedgewick, 2008, 822 pages, 9.8MB
Applied Discrete Structures
by Al Doerr, Ken Levasseur, 2013, 496 pp, multiple PDF files
Assessing Mathematical Proficiency
by Alan H. Schoenfeld, 2007, 391 pages, PDF
Combinatorial Theory: Hyperplane Arrangements
by Richard Stanley, 2004, PDF
Combinatorics Through Guided Discovery
by Kenneth P. Bogart, 2004, 202 pp, 1.2MB, PDF
Contemporary Issues in Mathematics Education
edited by Estela A. Gavosto, Steven G. Krantz, William McCallum, 1999
Discrepancy Theory
by William Chen, 2012, 99 pp, 960KB, PDF
Discrete Mathematics
Wikibooks, 2012
Discrete Structures
by Vladlen Koltun, 2008, 89 pp, 420KB, PDF
Elementary Computer Mathematics
by Kenneth R. Koehler, 2002
Enumerative Combinatorics: Volume 1
by Richard P. Stanley, 2011, 725 pp, 4.4MB, PDF
Exploring Discrete Mathematics Using Maple
by Kenneth H. Rosen, 1996, 400 pp, multiple PDF files
Fractional Graph Theory: A Rational Approach to the Theory of Graphs
by Daniel Ullman, Edward Scheinerman, 2008, 167 pages, 1.2MB, PDF
Graph Theory
by Keijo Ruohonen, 2008, 114 pp, 930KB, PDF
Graph Theory
by Reinhard Diestel, 2005, 422 pages, 2.9MB, PDF
Graph Theory: Advanced Algorithms and Applications
by Beril Sirmacek (ed.), 2018, 196 pp, multiple PDF files
Graph Theory Lessons
by Christopher P. Mawata, 2018, 384 pp, online reading
Handbook of Graph Drawing and Visualization
by Roberto Tamassia (ed.), 2013, 862 pp, multiple PDF files
Intersection Graphs: An Introduction
by Madhumangal Pal, 2014, 49 pp, 470KB, PDF
An Introduction to Combinatorics and Graph Theory
by David Guichard, 2017, 153 pp, 1.1MB, PDF
Introduction to Mathematical Philosophy
by Bertrand Russell
Lectures on the Philosophy of Mathematics
by James Byrnie Shaw, 1918, 222 pp, multiple formats
Mathematical Proficiency for All Students
by Deborah Loewenberg Ball, 2003, PDF
Matroid Decomposition
by Klaus Truemper, 2009, PS
The Mystery of the REAL, 3D Mandelbrot Fractal
by Daniel White, 2008
New Frontiers in Graph Theory
by Yagang Zhang (ed.), 2012, 526 pp, 18MB, PDF
New Perspectives in Algebraic Combinatorics
edited by L. Billera, A. Bjorner, C. Greene, R. Simion, R. Stanley, 1999, PS/PDF
Notes on Combinatorics
by Peter J. Cameron, 2007, 130 pp, 440KB, PDF
The Philosophy of Mathematics
by Albert Taylor Bledsoe, 1886, 248 pages, 16MB, PDF
The Philosophy of Mathematics
by Auguste Comte, 1851
A Primer of Mathematical Writing
by Steven G. Krantz, 2016, 276 pp, 1.3MB, PDF
Problems with and Without ... Problems!
by Florentin Smarandache, 2011, 136 pp, 880KB, PDF
Recreational Mathematics
Wikipedia, 2014, online html
Super Special Codes using Super Matrices
by W.B.V. Kandasamy, F. Smarandache, K.Ilanthenral, 2010, 161 pages, 580KB, PDF
Surreal Numbers: An Introduction
by Claus Tondering, 2005, 50 pages, 310KB, PDF
Teaching Mathematics at Secondary Level
by Tony Gardiner, 2016, 334 pp, online reading
Topics in Algebraic Combinatorics
by Richard P. Stanley, 2013, 224 pp, 1.2MB, PDF
Topics in Discrete Mathematics
by A.F. Pixley, 2010, 173 pp, 680KB, PDF
Uses of Technology in Upper Secondary Mathematics Education
by Stephen Hegedus, et al., 2017, 43 pp, multiple formats