According to Capricon's website:
In keeping with the Mad Scientist theme, this year we have experimented on the Dealer's Room. We intentionally replaced half of the room with Dealers who have not been to Capricon. We also chose our Dealers with an eye to have as much variety as possible

Based on the list of dealers, it doesn't look too good for books or book dealers.

erikvolson dropped off the Capricon board a few months ago.