You tried to remove all, even existing, links to the lower levels of abstraction (for example, by choosing to cover Moose and avoiding old school "bolted on" Perl OO mechanisms).
You may have had a bad download and read only half of the book; the "Blessed References" section is not only in the same chapter as the "Moose" section, but they're right next to each other. Furthermore, the "Moose" section includes discussions of polymorphism, attributes, method dispatch, roles, and inheritance which would have been covered anyway even if Moose hadn't been covered.
