Much effort was spent to have the abundance of new functions fit on 16 pages. After the book appeared, I decided to rework the Guide to use more pages, and different styles and fonts for clarity. The resultant PostScript file is now 80Kb, while it prints out almost identical to the 180Kb MS-Word version. When Perl 5 came out, the Guide was reworked to include the plethora of new features while still trying to be concise. I also used a scan of the Camel to create a real cover page.
Trademarks are funny.
If you don't use due diligence to protect them, you lose them. We've applied to treat all our cover animals as trademarks, so they don't get abused by other publishers, and we need to acknowledge them as such if they are used elsewhere. Thanks Tim, for the permission. The Perl Reference Guide is copyrighted by the author. It may be reproduced, printed and distributed freely for non-profit purposes, as long as the original author gets the credits, and the copyright notice is not removed from the text.