"R" in Action Comprehensive "R" Archive Network?

Will you describe your favorite libraries on http://cran.r-project.org/ in your book?

Absolutely. A significant amount of the power in R comes from the functionality added by user-contributed packages that can be freely downloaded from CRAN. I describe roughly 90 of these packages in R in Action. The ones that I think are most valuable are highlighted (with examples) in each chapter. A list of these packages is provided in Appendix F.