9.3 Documentation on LaTeX

You will find a nice free documentation on LaTeX with the title The Not So Short Introduction to LaTeX2e on CTAN in the directory :
ftp://ctan.tug.org/tex-archive/info/lshort.

This introduction is available as dvi, PostScript and pdf file. There is also a German version in the directory :
ftp://ctan.tug.org/tex-archive/info/LaTeX2e-Kurzbeschreibung.

Of course, there are various books available on LaTeX. For beginners, you might take a closer look to
L. LAMPORT LaTeX: A Documentation Preparation System User's Guide and Reference Manual

H. KOPKA and P.W. DALY A guide to LaTeX2e

For more advanced users, the following books will be of valuable help:
M. GOOSSENS, F. MITTELBACH and A. SAMARIN The LaTeX companion

M. GOOSSENS, S. RAHTZ and F. MITTELBACH The LaTeX graphics companion