I own 28,000 books – here's what I've learned

The author’s 28,000-book collection occupies about 700 metres of shelving—equivalent to seven football pitches—and far exceeds the available wall space in a typical home, requiring roughly 350 IKEA Billy units or industrial steel shelves. At an average weight of 400 g per volume, the books total around 11 tonnes, which caused structural damage when the floor’s load capacity was exceeded.