This brief text is for an easy introduction to number theory for more than just the math major. Written by a well known mathematician, it is the first undergraduate text to cover elliptic curves (needed for solving Fermat's last theorem).
An introductory text designed to entice non-math majors to think mathematically. The reader is gradually led from basic algebra to the point of actively performing mathematical research while getting a glimpse of current mathematical frontiers. The writing style is informal and includes many numerical examples which are analyzed for patterns and used to make conjectures. The emphasis is on the methods used for proving theorems rather than on specific results.