Another good system neutral OSR-style module to check out is Tomb of the Serpent Kings. It’s free as a PDF on DriveThru.
Tomb of the Serpent Kings - Deluxe Print Edition - People keep asking for "beginner" dungeons. Everyone can name "classic" dungeons - Tomb of Horrors, Barrier Peaks, The T
www.drivethrurpg.com
The draw of the style is the succinct descriptions, use of bullet points, maps on the same page or spread as the descriptions of the rooms, and other minor quality of life improvements in layout and design. This makes them wildly easier to use than modules with walls of text for everything. Much faster to read, prep, and run.