Free Textbooks in Mathematics : Number Theory

 Introductory Number Theory
 An Introduction to the Theory of Numbers by Leo Moser
 Elementary Number Theory by W. Edwin Clark
 Math 780: Elementary Number Theory, Notes by Michael Filaseta, 1997
 An Algebraic Circle Method, Thesis submitted by Thibaut PUGIN (Columbia U)
 Papers on Zeros of the Riemann Zeta Function and Related Topics, by Andrew Odlyzko
 padic numbers
 Lecture notes on padic numbers (Andrew Baker)
 Arithmetic Geometry
 Fermat’s Last Theorem
 William Hammond’s Fermat Archive
 Notes on Fermat’s Last Theorem, A.J. van der Poorten, Canadian Mathematical Society Series of Monographs and Advanced Texts, WileyInterscience, January, 1996, ISBN 0471062618
 Algebraic Number Theory
 A Computational Introduction to Number Theory and Algebra by Victor Shoup
 A Course In Algebraic Number Theory by Robert B. Ash
 Course Notes for elementary and algebraic number theory by Ivan Fesenko
 Course Notes by Jim Milne: Algebraic Number Theory
 Algebra and Number Theory by Andrew Baker
 Notes for Dick Gross’ Algebraic Number Theory Course by S. SatherWagstaff
 Algebraic Number Theory & Introduction to Automorphic Lfunctions by ChingLi Chai
 Lecture notes on Algebraic Number Theory by Jerome Hoffmann
 Introduction to Number Theory by Franz Lemmermeyer
 Analytic Number Theory
 Distribution of Prime Numbers, Lecture notes by William Chen
 Course notes for analytic number theory (Graham Everest) (ps 442K)
 Introduction to Analytic Number Theory by Noam Elkies
 Introductory Number Theory