one for the books

one for the books idiom
Also, one for the book. An outstanding or unusual achievement or event, as in All of the main awards went to one picture—that's one for the books. This expression originally alluded to record books kept for sports but soon was applied to other endeavors. [Colloquial; c. 1900]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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