IT Security Metrics : A Practical Framework for Measuring Security & Protecting Data has has solid reviews by Richard Bejtlich (@TaoSecurity), David J. Elfering (@icxc) & Dr. Anton Chuvakin (@anton_chuvakin), amongst others. You can get it (for a short time) for just about fourteen Washingtons by doing the following.
First, go toand enter “ETXTBOOK” (no quotes) as the code, you’ll get a credit of $10.00USD for Amazon Kindle textbooks. That credit expires on January 9th, 2012, btw.
Now, if you view IT Security Metrics : A Practical Framework for Measuring Security & Protecting Data on Amazon and order it (again, by January 9th, 2012), it will cost you a whole ~$14.00USD