The R Programming wikibook is not just another one of the many free books about statistics/R, it is a community project which aims to create a cross-disciplinary practical guide to the R programming language. Here is how you can join:
Rob Calver wrote an interesting invitation on the R mailing list today, inviting potential authors to submit their vision of the next great book about R. The announcement originated from the Chapman & Hall/CRC publishing houses, backed up by an impressive team of R celebrities, chosen as the editors of this new R books series, including:
In this new edition, Professor Fox has teamed with Professor Sandy Weisberg, to refresh the original edition so to cover the development gained in the (nearly) 10 years since the first edition was written.
Here is what John Fox had to say:
Sandy Weisberg and I would like to announce the publication of the second edition of An R Companion to Applied Regression (Sage, 2011).
As is immediately clear, the book now has two authors and S-PLUS is gone from the title (and the book). The R Companion has also been thoroughly rewritten, covering developments in the nearly 10 years since the first edition was written and expanding coverage of topics such as R graphics and R programming. As before, however, the R Companion provides a general introduction to R in the context of applied regression analysis, broadly construed. It is available from the publisher at (US) or (UK), and from Amazon (see here)
The book is augmented by a web site with data sets, appendices on a variety of topics, and more, and it associated with the car package on CRAN, which has recently undergone an overhaul.