Napoleon, according to this article from Open Culture, owned so many books he needed his own personal librarian. He was also very keen on having a significant collection of his books with him whenever he went travelling. This worked well for a while…
Napoleon’s Kindle: see the miniaturized traveling library he took on military campaigns
… but eventually “Napoleon found that many books which he wanted to consult were not included in the collection,” for obvious reasons of space. And so, on July 8, 1803, he sent his librarian these orders:
The Emperor wishes you to form a traveling library of one thousand volumes in small 12mo and printed in handsome type. It is his Majesty’s intention to have these works printed for his special use, and in order to economize space there is to be no margin to them. They should contain from five hundred to six hundred pages, and be bound in covers as flexible as possible and with spring backs. There should be forty works on religion, forty dramatic works, forty volumes of epic and sixty of other poetry, one hundred novels and sixty volumes of history, the remainder being historical memoirs of every period.
In sum: not only did Napoleon possess a traveling library, but when that traveling library proved too cumbersome for his many and varied literary demands, he had a whole new set of not just portable book cases but even more portable books made for him. … This prefigured in a highly analog manner the digital-age concept of recreating books in another format specifically for compactness and convenience — the kind of compactness and convenience now increasingly available to all of us today, and to a degree Napoleon never could have imagined, let alone demanded.