Bob has been involved in semantic web work since 2002. He performs solution requirements, architecture analysis, design, and semantic model-driven application development for TopQuadrant, the leading provider of software and solutions for modeling, developing and deploying semantic web applications on Windows, the Mac and Linux. He came there from Innodata Isogen, where he did system and architecture analysis and design for a wide range of global publishing clients as well as co-chairing the 2008 Linked Data Planet conference in New York City.
He is the author of Manning Publications' XSLT Quickly, Prentice Hall's XML: The Annotated Specification and SGML CD, and McGraw Hill's Operating Systems Handbook. Bob has written for Nodalities Magazine, O'Reilly Network's XML.com, Dr. Dobb's Journal, and IBM developerWorks. He received his BA in Religion from Columbia University and his Masters in Computer Science from New York University. In the XML.com newsletter, editor Kendall Clark once wrote "Does anyone write tech prose as clear as Bob?"
Contact him at firstname.lastname@example.org, especially if you have problems with examples in the book. For more general SPARQL questions, you'll probably get a quicker answer at the questions section of semanticweb.com because of the number of people around the world who know SPARQL well and check it often.