Since we launched Cisco Subnet at the beginning of last year, we've been regularly posting up exclusive chapters from new and classic Cisco Press books on to our site (browse the library here). Many of the authors take up guest blog spots for month-long stints and many of them have stayed on as permanent bloggers, including Jeff Doyle, Jamey Heary, Wendell Odom and Mark Lewis. Here we've compiled the top 20 most-read Cisco Press book chapters as accessed by our readers over the year. What did you think of the book/chapter? Was it helpful in your job/career? Give your ratings for the top 20 books/chapters here. And don't forget to check our monthly Cisco Press book giveaways here. Books are listed by their cumulative user ratings. You can either rate a book on this page (drag your mouse across the stars, then click) or on the description pages for each book.