Can anyone plz give me a proper/decent pdf copy for some/all of the following books. Could find only the scanned, unreadable copies in the internet. I need them at the earliest.....Thanks

1. Elements of discrete Mathematics by C. L. Liu

2. Algorithm design by Jon Kleinberg and Eva Tardos

3. Probability and Statistics with reliability queuing and computer science applications by K. S. Trivedi

4. Introduction to graph theory by Douglas West.

5. Linear Algebra by K.H.Hoffman and R.Kunze

6. Design of Unix Operating system by Maurice Bach