We publish books about free software!

The following titles are available:

The Guile 2.0 Reference Manual (for Guile version 2.0.3)	The R Reference Manual Volume 1 Base Package	The R Reference Manual Volume 2 Graphics	The R Reference Manual Volume 3 Statistics
The R Reference Manual Volume 4 Methods and Tools	An Introduction to Python The Python Tutorial (version 3.2)	The Python Language Reference Manual (version 3.2)	The Apache HTTP Server Reference Manual (for Apache version 2.2.17)
The Org Mode 7 Reference Manual (for Org version 7.3)	PostgreSQL 9.0 Reference Manual Volume 1A	PostgreSQL 9.0 Reference Manual Volume 1B	PostgreSQL 9.0 Reference Manual Volume 2
PostgreSQL 9.0 Reference Manual Volume 3	The Perl Language Reference Manual (for Perl version 5.12.1)	An Introduction to GCC	An Introduction to R the R tutorial
GNU Scientific Library Reference Manual Third Edition (v1.12)	GNU Octave Manual Version 3	Valgrind 3.3 Advanced Debugging and Profiling for GNU/Linux applications

You can buy the books online from all major bookstores, or order them from any local bookstore using the ISBN.

All our books are freely redistributable.