Sometimes the things you'll find on a bookshelves of your local book store can be quite unusual and downright weird. Consider the following super-hero themed series of books on Windows products by O'Reilly.
Yes, and it looks especially funny if you compare this Windows-user oriented series of books to their Linux / FOSS user oriented book covers, like the one here:
I think this is brilliant. Aside from the obvious campiness and fun, they set themselves apart from other technical texts that appear to the average reader intimidating and complex.
I guess the non super-hero books are for 'professionals'. It would be rather difficult to be consulting one of these 'action books' as reference material during work or school time and not have people/boss/management think "What the hell? Is he reading comics during work/class
Poetic that they are immediately followed by an "Annoyances" series of books in the lower right of the picture. "Excel Annoyances", "Word Annoyances", ...