In addition to the current print edition of the Definitive Guide to Apache mod_rewrite, I'm currently working on a rewrite. The book will be available in HTML and a Kindle book, and possibly in other formats. I'd like to do a print format eventually, once it gets to a reasonable level of completeness.
I would love to hear from you regarding the current edition, and what changes and/or additional content you'd like to see in there.
If you'd like to keep up to date on development, and be informed of new releases of the book, please follow me on Twitter.
If you'd like to support this effort financially, there are few thing you can do. You can buy the book for your Kindle, you can donate something via Palpal, or you can use the HTML version of the book and put up with the ads.
Finally, if you are so inclined, you can get an svn checkout and submit patches:
svn checkout http://svn.rcbowen.com/svn/public/mod_rewrite_book