Here you can find lists of great Math books are or have been used to teach courses at Stanford.
By: Dimitri P. Bertsekas, John N. Tsitsiklis
By: Jean Walrand
By: Robert G. Gallager
By: Stephen Boyd, Lieven Vandenberghe
By: Joe D. Hoffman, Steven Frankel
By: Michael Mitzenmacher, Eli Upfal
By: Sheldon Ross
By: Joe Blitztein, Jessica Hwang
By: Roman Vershynin