In the rules it states:

"All entrants agree to permit Network World to publicize their entry on its web site and in other media, and use their entries for Network world marketing/advertising materials in all media and in perpetuity and for any and all purposes"

I like free stuff, but "in perpetuity and for any all purposes" seems like a lot for a book that would probably cost less than 50 bucks.

Reminds me of the free PC adds of a few years past. The PC was free, but it came with several requirements.

To each his own, I guess.