The Matrix Cookbook
Kaare Brandt Petersen & Michael Syskind Pedersen
Book of Proof
Richard H. Hammack
Probabilistic Graphical Models: Principles and Techniques
Daphne Koller & Nir Friedman
A First Course in Mathematical Modeling
Frank R. Giordano & Maurice D. Weir & William P. Fox
Calculus
Gilbert Strang