Reddit reviews Fluid Mechanics (Dover Books on Physics)

Fluid Mechanics 4th Edition by Kundu (A good graduate level text. The practice problems are really great and challenging. The 5th edition has better practice problems, but the layout and content of the 4th is better IMO.)

Elementary Fluid Dynamics by Achenson (Good graduate level text with mathematical rigor.)

Fluid Mechanics by Granger (A good undergraduate level text.)

An Introduction to Fluid Dynamics by Batchelor (This one is much more advanced than the rest.)

I am doing my master's in fluids and have had a few different books. I think my favorite was Granger's book and as a bonus it's really cheap!

http://www.amazon.com/Fluid-Mechanics-Dover-Books-Physics/dp/0486683567

Fluid Mechanics by Granger is fairly elementary.