Self study text for Elementary Number theory What is a very helpful book for elementary number theory? I would like to teach myself and I need help finding a book that would be able to do this.
George Andrew's number theory is fun and good.

Ivan Niven's book is complete and covers continuous fractions really well

Ireland and Rosen's modern number theory is a master piece, but requires some notions of modern algebra
Hardy' s and Wright' s is also a master piece!