Contemporary abstract algebra [10th edition] by 
Crossing the River with Dogs [3rd edition] by 
Discrete Groups, Expanding Graphs and Invariant Measures [1st edition] by 
A discrete transition to advanced mathematics [eBook] by 
A Discrete Transition to Advanced Mathematics [physical copy] by 
Expander families and Cayley graphs a beginner's guide by 
Graph Theory [5th edition] by 
Graph Theory [3rd edition] by 
Introduction to Real Analysis [4th edition] by 
Numerical Approximations of Exact Controls for Waves [1st edition] by 
The Little SAS Book : a primer : a programming approach by 
Applied Regression Modeling [3rd edition] by 
Applied Regression Modeling [2nd edition] by 