It is the longest unsolved missing person's case in the NYPD.
Following the Judge's disappearance, "Pulling a Crater" became a part of the lexicon, as did "Judge Crater, please call your office," by comedians.
Novelist Peter Quinn wondered about his disappearance for years ~ his father was a justice at the same courthouse as Judge Crater ~ and he decided to fictionalize the story in The Man Who Never Returned, through the eyes of a detective in 1955. This past August, Alan Feuer interviewed Quinn for an article in the New York Times. Quinn's fascination and involvement in this case is detailed in this informative article.
In August 2005, authorities announced they had received notes left by the wife of an NYPD officer, after her death at age 91. The notes alleged the judge was buried under the boardwalk in Coney Island. Author Richard J. Tofel expressed skepticism of the woman's account in his book, Vanishing Point: The Disappearance of Judge Crater and the New York He Left Behind.
Sounds like some intriguing books for my Christmas list!