I recently got around to putting away all the books that were lying around on the front of the shelves, and made the horrible discovery that I have precisely 32 inches of shelf space left. So I did what anyone with a spirit of scientific inquiry would do: I measured my unshelved books (mostly my TBR pile, overflowing out of a cardboard box). Not only do they outstretch the available space by more than half a metre, but if I could get them into a single stack without toppling they’d come past the level of my chin. Granted, I’m short, but it’s still a little alarming to think that with very few additions, my TBR pile could end up taller than me.
And, of course, that impending shelf space crisis ... Well, I did put “cull my book collection” on my to-do list :-(