The tutorial type technical books are very successful with people going after vendor certifications. In this case the audience has a fair degree of technical kn

The tutorial type technical books are very successful with people going after vendor certifications. In this case the audience has a fair degree of technical knowledge but is looking for a path through a particular aspect of the domain. With the main vendors like Cisco and Microsoft, I don't know many people that don't get the book even if they are doing the bulk of their studying with online resources. There is a big difference between the good and the bad in this realm. A good book is worth keeping even after you've passed the exam.