Our look is the result of reader comments, our own experimentation, and feedback from distribution channels. Distinctive covers complement our distinctive approach to technical topics, breathing personality and life into potentially dry subjects.

The image on the cover of Practical Unix and Internet Security, Third Edition, is a safe. The concept of a safe has been with us for a long time. Methods for keeping valuables safely have been in use since the beginning of recorded history. The first physical structures that we think of as safes were developed by the Egyptians, Greeks, and Romans. These early safes were simply wooden boxes. In the Middle Ages and Renaissance in Europe, these wooden box safes started being reinforced with metal bands, and some were equipped with locks. The first all-metal safe was developed in France in 1820.

Matt Hutchinson was the production editor and proofreader for Practical Unix and Internet Security, Third Edition. Emily Quill, Jane Ellin, and Claire Cloutier provided quality control. Genevieve d'Entremont, Sue Willing, David Read, and Mary Brady provided production assistance. Angela Howard wrote the index.

Edie Freedman designed the cover of this book, using a 19th-century engraving from the Dover Pictorial Archive. Emma Colby produced the cover layout with QuarkXPress 4.1 using Adobe's ITC Garamond font.

Bret Kerr designed the interior layout, based on a series design by David Futato. This book was converted by Joe Wizda to FrameMaker 5.5.6 with a format conversion tool created by Erik Ray, Jason McIntosh, Neil Walls, and Mike Sierra that uses Perl and XML technologies. The text font is Linotype Birka; the heading font is Adobe Myriad Condensed; and the code font is LucasFont's TheSans Mono Condensed. The illustrations that appear in the book were produced by Robert Romano and Jessamyn Read using Macromedia FreeHand 9 and Adobe Photoshop 6. The tip and warning icons were drawn by Christopher Bing. This colophon was written by Matt Hutchinson

The online edition of this book was created by the Safari production group (John Chodacki, Becki Maisch, and Madeleine Newell) using a set of Frame-to-XML conversion and cleanup tools written and maintained by Erik Ray, Benn Salter, John Chodacki, and Jeff Liggett.