John Hales is also the author of many books, from involved technical books from Sybex and Cengage to exam preparation books, to many quick reference guides from BarCharts, in addition to custom courseware for Fortune 500 customers. His latest book on vSphere is entitled Administering vSphere 5: Planning, Implementing and Troubleshooting. He has taught in many countries in Europe (including Russia, The Netherlands, Germany, Latvia, England, France, and Ireland), the Middle East (including Israel and Afghanistan), Asia (including China, Malaysia, and Japan), Australia, and North America (United States and Canada). John has various certifications, including the VMware VCA-DCV, VCA-DT, VCA-Cloud, VCP, VCP-DT, VCAP-DCA, the Microsoft MCSE, MCDBA, and MOUS, the EMC EMCSA (EMC Storage Administrator), and the CompTIA A+, Network+, and CTT+. He enjoys reading, travel, and spending time with his family. John lives with his wife and children in Sunrise, Florida.