I bought this book in january and have been reading snippets here and there. things change rapidly with apache (right now I'm working on webdav--which wasn't even released until a month ago for apache). Still, 98% of the book is up to date and the author organizes the material extremely well. I found especially helpful the discussions on installing mod_perl, security and login access. My only complaints are that the book doesn't easily list respective functions of the standard modules on a single page, and that it doesn't list some of the apache offshoots, like apache for java and xml. I know that Oreilley is working on updating their earlier apache book (which wasn't really worth reading anyway), so there's bound to be excellent books about apache coming down the pipe. However, this book has answered every question I have had, and covers things more thoroughly than a web how-to might. Highest recommendations.