I digged deeply and nominate three uploads from the early days of the PCML, two biographies
- Bryant, Walter: Kepler
A 1920 biography of the astronomer Johannes Kepler.
prc-version:
https://www.mobileread.com/forums/showthread.php?t=31058
- Brewster, David: THE MARTYRS OF SCIENCE
Biographies of Galileo, Brahe and Kepler.
prc-version:
https://www.mobileread.com/forums/showthread.php?t=26195
and a mystery
- Edward, Sir Sir Ralph Sir: The Case of the Golden Coprolite.
A mystery by our own Sir Sir Ralph Sir Edward, issued first in serial form in the Lounge, and now in a single volume for your delectation.
prc-version:
https://www.mobileread.com/forums/showthread.php?t=34198