If you want to learn more about this kind of crime, I highly recommend a little book by Miles Harvey called THE ISLAND OF LOST MAPS: A TRUE STORY OF CARTOGRAPHI

If you want to learn more about this kind of crime, I highly recommend a little book by Miles Harvey called THE ISLAND OF LOST MAPS: A TRUE STORY OF CARTOGRAPHIC CRIME. Fascinating whodunit regarding thieves who would go into rare book collections and quietly use a razor blade to carefullytear out an ancient map inside some hundreds-of-years-old book, and often then sell it for huge sums.