Indeed. The problems are well-known, and solutions should be easy to find. The interesting part of the challenge is wielding Perl 6 expertly in order to produce something readable, beautiful, and enjoyable.
I can honestly say that the book didn't cross my mind while I was preparing this contest.
Now that I'm done planning the contest, I'm going to let the book cross my mind a bit more often, so we can get it out the door to all those Perl6-hungry developers. :-)