JH
Jim Harmon
James Judson Harmon, better known as Jim Harmon, was an American short story author and popular culture historian who wrote extensively about the Golden Age of Radio. He sometimes used the pseudonym Judson Grey, and occasionally he was labeled Mr. Nostalgia.
Excerpt from Wikipedia, available under CC BY-SA 4.0.
Books

Loot of the Vampire and the Man Who Made Maniacs
2018
ISBN 9781612873992
The Science Fiction Archive #2
2018
ISBN 9783963765605