How many pages must you read to know?

I am writing this after only ten fun-filled pages of John Twelve Hawks’s The Traveler, the new publishing sensation.  I dragged Alex and Robin Hanson to Borders after lunch yesterday and picked up a copy from the front table on the first day of release.  Is it a spy story?  Fantasy?  Science fiction? 

The author, by the way, claims to "live off the grid," here is a profile (of sorts).  To maintain his anonymity he (supposedly) speaks only by satellite phone to his publisher and agent.  Here is the book’s entertaining website, which includes Q&A with the author.  Here is a strong Janet Maslin review, from The New York Times.