He has written several certification books on Windows, security, IT project management, and UNIX, and was the co-author of CompTIA A+ Complete Study Guide (Sybex). Chuck Easttom is CEO and Chief Trainer for CEC-Security, which specializes in IT security training and CISP and Security+ exam preparation. He has over 18 years in the IT industry, 10 years teaching and training, and has authored 15 published books.show more