I'm a bit torn.
I really find time travel obnoxious for the most part (and usually it leaves some pretty big plot holes laying about) and I'm not a big fan of the TCW (unless the nature of it is explained in this novel, I'm still not even sure what the hell it was supposed to be about). Also, I wish we could have gone with different characters. Mulder and Scully... really? It was cute in one episode, but I'm not sure about them as main characters of a book.
On the other hand, Christopher's world-building skills and attention to detail are very well suited to writing a novel of this type.
Odds are I'll give it a try, but will be really Lucsly about it.