The Man who Loved Only Numbers - By Paul Hoffman. A biography of Paul Erdos. Site devoted to the book and the man.
Sphere Packing, Lattices and Groups - J. H. Conway and N. J. A. Sloane (Springer, 1998). Contents, errata (including a missing page), updated tables and database.
Algorithmic Number Theory - Eric Bach and Jeffrey Shallit. Errata, bibliography in BibTeX format.
Reciprocity Laws from Euler to Eisenstein - Franz Lemmermeyer (Springer, 2000). Contents, bibliography, errata.
A Friendly Introduction to Number Theory - J.H. Silverman. Contents, preface, errata, further material.
Gauss and Jacobi Sums - Bruce C. Berndt, Ronald J. Evans, and Kenneth S. Williams (Wiley, 1998). Contents, errata, remarks, reviews.
Automorphic Forms and Representations - Dan Bump. Errata, contents, virtual study group.
Notes on Fermat's Last Theorem - Alf van der Poorten (Wiley, 1996). Contents, reviews.
An Invitation to Arithmetic Geometry - Dino Lorenzini. Additions, corrections, review, preface.
Collected Papers of Sarvadaman Chowla - Edited by James G. Huard and Kenneth S. Williams. Contents.
Local Fields and Their Extensions, Second Edition - I.B. Fesenko, S.V. Vostokov. PostScript.
Voronoi's Impact on Modern Science - Edited by P.Engel and H.Syta. Contents, ordering information.
Fundamental Number Theory with Applications - Richard A. Mollin. Contents.
Discovering Number Theory - A textbook by John Jones and Jeff Holt.
Paul Garrett's Crypto and Number Theory Lecture Notes - Introduction to cryptology, number-theory, and algorithms. Protocols. Symmetric versus asymmetric systems. Stream, block ciphers. One-way functions, signatures. Key management. (Pseudo-) random number generation. Permutation groups. Primes, Euclidean algorithm. Finite fields. Quadratic reciprocity. Discrete logs, RSA. Pseudoprimes, rho method. Elliptic curve methods.
eBooks in Number Theory - Mainly connected with Smarandache problems. PDF, HTML, WORD, WP, TeXT formats.
Area, Lattice Points, and Exponential Sums - Martin Huxley (OUP/LMS, 1996). Author's page with summary and errata.
The Geometry of Numbers - C.D. Olds, Anneli Lax and Giuliana Davidoff (MAA, 2000). Table of contents, preface and sample chapter in PDF.
Analytic Number Theory and Applications - To Prof. Anatolii Alexeevich Karatsuba on the occasion of his 60th birthday. A collection of papers in DVI and PostScript format.
Taming Wild Extensions - By Lindsay N. Childs. Introduction.
Primes of the Form x^2 + ny^2 - By David A. Cox, Amherst College (Wiley, 1989). Errata.
Cohomology of Number Fields - Jürgen Neukirch, Alexander Schmidt and Kay Wingberg. Errata.