ps.89 said: Me personally, I would go with the Cisco Press Books by Wendell Odom. I've read books from both authors for my ICND1 and both are great. However, I feel that Odom's book prepared me more. Like others have said before, Lammle's is for those that are inexperienced and need help comprehending difficult concepts, whereas Odom's is more dry and straight to the point. I prefer Odom's way. Since you're renewing your CCNA, this is more of a refresher for you so you probably want just the information and none of the fluff.