Number Theory Text Similar to Conceptual Physics by Paul G. Hewitt?

[Willowz]

Hello, :)
Does anyone have any good ebooks or pdf's about number theory? If so is there anything like Paul G. Hewitt's Conceptual Physics? I loved the book :)

 

[qntty]

http://www.trillia.com/moser-number.html

and some notes
www.artofproblemsolving.com/Resources/Papers/SatoNT.pdf[/URL]
[PLAIN]ftp://joshua.smcvt.edu/pub/hefferon/numbertheory/book.pdf[/URL]

 

[Bhajun]

A couple more:

http://www.math.mtu.edu/mathlab/COURSES/holt/dnt/