Amazon.com just posted my four star review of Ninja Hacking by Thomas Wilhelm and Jason Andress. From the review:
Ninja Hacking is not a typical digital security book. When I saw the title I expected the use of "Ninja" to be a reference to a style of digital attack. While this is true to a certain extent, Ninja Hacking is about actual Ninja concepts applied to the digital world. The book is an introduction to Ninja history and techniques, applied to the modern digital security context. That was not at all what I expected, but I found the result intriguing.