Notation: *** means recommended, ## is what I am going to read.
[2001, book]
Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest, and Clifford Stein, Introduction to Algorithms, 2nd ed., Cambridge, MA: MIT Press, 2001. ***
Compare the Donald Knuth's bibles, this is much easier.
[2003, book]
Sheldon Ross, Introduction to Probability Models, 8th ed., Academic Press, 2003. ***