Recent and Near-Future Reading (and Writing)

As you might know from my most recent post, I just finished A Storm of Swords.  This puts me at least a whole season ahead of HBO's Game of Thrones, which should help me to avoid spoilers.  Now, I can get back to the business at hand:  reading planetary romance, starting with the John Carter of Mars books.
... except that my plans have changed.
You see, I set out to read planetary romance as a form of research in preparation for NaNoWriMo, but my thoughts on the novel that I was to write have transformed it from throw-away adventure into magnum opus. It feels as weird as it sounds.  Anyway, that means that I'm shelving it until I get more practice at this whole novel thing.  So, what do I do now?
Thanks to cthulhuchick on twitter, I've discovered that one John Maddox Roberts wrote a series of mystery novels that take place in ancient Rome.  Throw-away comment about vampires in ancient Rome?  You're becoming a throw-away novel about vampires in ancient Rome.
New problem:  I know nothing about ancient Rome, and it's about the end of August.  This is not enough time to learn about ancient Rome and fully outline a novel!  What do I do?
I'm basically looking at two options now:
1.  I re-attempt last year's novel.
2.  I skip NaNoWriMo this year.
Unless I get a story idea about a subject with which I'm already familiar, these are my two options, and they're both looking about equal right now.

So, my reading schedule, at the moment, is some SPQR, some Barsoom, and some H.P. Lovecraft.