More and more high-quality information is showing up for free on the Internet. Case in point: you can now go online and access an 800-page textbook on how to administer a Cisco-powered computer network. The book, by information technology and IT security professor Matt Basham of St. Petersburg College in Clearwater, FL, is designed for people with very minimal computer experience who suddenly find themselves responsible for administering a TCP/IP-based network. Two thousand copies were downloaded within the first few days that it was online. Interested? Here’s where to get it.