I've just collected all of the books I've ever bookmarked from Amazon (and have yet to purchase) into a single text file. There are 230 of them.
At the rate of six hours per book (a decent estimate at the average time I spend reading a book I manage to finish), that's 1380 hours of reading. Or 57 complete days.
A digital form of 'tsundoku', the Japenese word for 'buying books and not reading them; letting books pile up unread on shelves or floors or nightstands'.