That's one for the books

That's/There's one for the books.

  (British, American & Australian informal) also That's/There's a turn-up for the books. (British & Australian informal)
something that you say when something strange or surprising happens My sister stayed in on a Saturday night! There's one for the books. That's a turn-up for the books - a Frenchman who loves English food.
See cook the books, hit the books
See also: book, one