Very early science fiction (before it was even called that). Originally serialized in 18 parts in Land & Water Magazine, October 1919 to February 1920

A recent review in the British newspaper The Independent said :
"Green’s novel, which involves a case of wrongful suspicion in a murder, was highly regarded for its insight into legal procedure, and was used at Yale as an example of the dangers of relying on circumstantial evidence. But it also conforms to the demands of Victorian popular fiction, complete with over-ripe exclamations, red herrings, sinister strangers, lost keys and torn-up letters. What differentiates it from British equivalents is its snappy pacing."

Marion Zimmer Bradley was a science fiction fan before she became a famous author, so this early work unsurprisingly feels a lot like some of the early guides to SF books that were published by fans in the early days of the genre. But here we are looking at a very different kind of fantasy!

Worth browsing through if you are at all interested in the subject, but hopelessly outdated if you're looking for a guidebook.

If you like the Saint stories by Leslie Charteris, you'll want to read this story by Randall Garrett. He does a good job of re-locating the saintly swashbuckler on another planet. We may be in outer space, but there are still jewels to be stolen and gangsters to be told off.