Elementary Number Theory

the content of this book is a little odd: it seems narrowly oriented towards getting enough number theory to understand RSA, Diffie-Hellman, and elliptic curve cryptography.

i very much enjoy a book with the same title but by burton:

http://www.mcgraw-hill.co.uk/html/0071244255.html

it contains a lot more of number theory and a little cryptography too.

There must be dozens of books named "elementary number theory", is this one somehow special?