Hamlet's Hit Points by Robin Laws is a book that proposes a system for analyzing fictional works as if they were story-oriented role-playing games. The core system is breaking the story down into beats which involve procedural and dramatic ups and downs for the protagonists. There's more breadth than that summary implies, but on the whole it's a fairly simple system and along with the commentary is definitely inspirational. The phrase 'hit points is more there for alliteration, the system does not examine any such values for characters but instead looks at the ebb and flow of their fortunes.
Are you interested in the theory of RPGs? If so, do you think of the system as primarily a conflict resolution mechanism in a cooperative game? Are you unsatisfied with your ability to emulate some of your favorite stories using present tools and want to understand the why (if not necessarily the how)? Then I'd say buy Hamlet's Hit Points. It's a fairly swift read, available in print or a variety of electronic forms, and a fairly unique form of criticism to boot.
[Updated: Grammar fixes.]