Quote:
Originally Posted by R.D. Silverman
I would add:
Hardy & Wright Introduction to the Theory of Numbers
D. Shanks Solved & Unsolved Problems in Number Theory
If more advanced books are desired, I can recommend them.
Stay away from Serre's "A Course in Arithmetic" or any of Serge Lang's
books [RIP]

While browsing in a secondhand bookshop in Exeter a few years ago I came across:
"An Introduction to the Theory of Numbers" by Niven, Zuckerman & Montgomery.
I rather like it, though mine is the 3rd edition. The latest is the 5th and is described by Amazon at
http://www.amazon.com/exec/obidos/tg...glance&s=books
Another one is Baker's "A Concise Introduction to the Theory of Numbers",
http://www.amazon.com/exec/obidos/tg...glance&s=books
It is undoubtedly condensed, but another nice book I picked up very cheaply.
Paul