Jewel of the Lunar Rift is a newly released (June 2018) low level module, the first product from Verisimilitude Society Press. Its author, Extildepo, posts on
Dragonsfoot, a 1e forum. Despite this, it's for the OD&D clone
Swords & Wizardry, though honestly, looking at the stats, it seems like
Blueholme or another Holmes clone would be closer, as Dexterity is listed for every monster (which Holmes needs for initiative) and there's made mention of a saving throw vs. Death Ray (while S&W uses a single saving throw for every situation).
Although the PDF clocks in at a fairly impressive (for $2, at least) 34 pages, the adventure itself is only about 7 single column pages and 18 rooms. Despite the author mentioning he only wants to give enough background info to run the adventure, it doesn't actually start until page 10 since he gives a lot of background information, not just on the module, but also his house rules and background for his setting. Basically it's a more medieval feel than regular D&D, with a strong church and superstitious peasants.
