Emilio Raggi lives in Buenos Aires, Argentina, and works in one of the biggest companies in the country. He was very much a Windows fanboy, until one day, he had to manage a Ubuntu desktop deployment. He was highly qualified as a Microsoft implementer, holding certificates as an MCP and MCSE, and worked as a consultant for a Microsoft partner. Still, Ubuntu had its charms and won him over. He is also an avid student of philosophy.
Keir Thomas is an award-winning author who has written several best-selling beginning-level Linux titles for Apress. A former computer magazine editor, he has been writing about computers, operating systems, and software for a decade. He has also edited many computing titles and works as a full-time author. He lives on the side of a mountain in England, and his hobbies include hiking and playing musical instruments.
Sander van Vugt is an independent trainer and consultant, living in the Netherlands and working throughout the European Union. He specializes in Linux and Novell systems, and has worked with both for more than 10 years. Besides being a trainer, he is also an author, having written more than 20 books and hundreds of technical articles. He is a Master Certified Novell Instructor (MCNI) and holds LPIC-1 and -2 certificates, as well as all important Novell certificates.