The New Annotated Sherlock Holmes is a series of three annotated books edited by Leslie S. Klinger, collecting all of Arthur Conan Doyle's short stories and novels about Sherlock Holmes.

The books were originally published by W. W. Norton in oversized slipcased hardcover editions.

The publication of the Sherlock Holmes canon was released to "enormous critical acclaim",[3] having been called "definitive",[4] "A must-have for any serious mystery fan",[5] and "a landmark in Sherlockian publishing.

"[6] The books, like other Sherlockian works, assume an in-universe perspective—that Holmes and Watson are real persons, with Doyle merely being a literary agent—and some of the scholarship is only pseudo-serious.

"[8] Almost ten years later, Posner would be one of the judges involved in the lawsuit against Conan Doyle Estate Ltd filed by Klinger himself.