3 full size book cases of hardbacks, count unknown, but definitely in the hundreds. Mostly fiction and military sci-fi, but some non-fiction. Entire 6 volume set on WWII by Churchill, for instance.

Lots of paperbacks, enough to fill 2 or more full size floor to ceiling book shelves. Again, mostly fiction and sci-fi, but some of it is old, like the Robotech books, and lots of Star Trek books.

More than 160 on Kindle, plus 190 I have from Baen's free library. I intend to get hard copies of as much of my kindle library as I can, as Amazon can't erase a book out of your library if it is on a shelf in your house. ;)

I started reading Hardy Boys and Tom Swift in 5th grade, and have been a reader ever since.