BNBBOOK is an easy to install and configure guestbook script with many useful features. Some of its main features are: Autorespond letter to signer, Filters out your list of dirty words, Domain check to prevent offsite calling of the script, Newest entry at top of the book, Easy to modify letters and guestbook entry formats, Handles 'private' messages, Allows for signers to use HTML, Removes all HTML comments to prevent SSI hacks, MUNG e-mail address to foil spam-spiders, Specify required entry fields and Validates E-mail address formatting.