Book on Internet Security and SSL?

A friend of mine is looking for a introductory level book that explains internet security issues (SSL in particular). Any suggestions?

NRCC chairman predicts House floor vote on SAFE in weeks

From a conversation I had yesterday with Rep. Tom Davis (R-Va), National Republican Congressional Committee chairman. The GOP is using encryption policy as a way to bash Democrats who blindly back the administration. --Declan http://www.wired.com/news/news/politics/story/20641.html House GOP