Most overdue library book
Who
Unknown
What
288 year(s)
Where
United Kingdom (Cambridge)
When
1956

The record for an unreturned and overdue library book was set when a book in German on the Archbishop of Bremen, published in 1609, was borrowed from Sidney Sussex College, Cambridge by Colonel Robert Walpole (England) in 1667–68. Prof. Sir John Plumb (UK) found the book 288 years later in the library of the then Marquess of Cholmondeley at Houghton Hall, Norfolk. He returned it, but no fine was exacted.