Elementary Number Theory in Nine Chapters
"In contrast to far too many mathematics books, this book has lots of text surrounding all the mathematical formulas. It's all a very rich mix, and I suspect students would enjoy using this book; I also suspect they would find it quite challenging.  Tattersall's Nine Chapters came out just a week or so late for me to select it for my Number Theory course this spring. Next time around, it'll be high on the list of possible textbooks for the course."  MAA Online  "An appropriate addition to a number theory collection."  Choice  "Written in a rousing style...many exercises--I counted 891--and many of them are rather ingenious!"  Monatshefte fur Mathematik  "Written in a rousing style...many exercises--I counted 891--and many of them are rather ingenious!"  Monatshefte fur Mathematik