The second edition of The LaTeX Companion is a thorough rewrite of the first edition. If you're seeking a single source for improving your LaTeX documents (in ways you never imagined), this is your book. It is really a tour de force in technical documentation and clearly a labor of love from its numerous authors. The extensive coverage of packages and the examples are very useful. In addition, every example is provided in the CD that comes with the manual. The CD also includes a complete LaTeX installation. You will not find a better text for working with LaTeX and I highly recommend it.PS I've been using LaTeX since 1990 and am familiar with all the principal manuals.