I think I found some inconsistencies with the way some things are
calculated. I have a pile of books registered on BGG that aren't in
the stats. Which leads me to assume that books are not counted. I
don't care if it is or not either way but the following book is still
in the database:
Playing with Pyramids.
Additionally the following two game collections are pretty much game
books in terms of content, just that the 'pages' are cards:
Party Games
52 Fun Things to do on the Plane
Finally, the following book is, in my stats page, listed as "Favorite
games you don't own". While I in fact own it. I suspect its an issue
with the way you decide what's included in the database or not:
Abbot's New card Games
Finally, for the record, I love your stats. I'm especially fond of the
"Games you should play soon" section as a means of deciding what to play.