An interesting fact about Boltzmann and (S = k_B \ln \Omega) is that this equation is the epitaph on his tombstone in Vienna (image below).
Also, because of the manner of his death, the following introduction to DL Goodstein's 1975 book States of Matter is... well... also interesting (at least):
"Ludwig Boltzmann, who spent much of his life studying statistical mechanics, died in 1906, by his own hand. Paul Ehrenfest, carrying on the work, died similarly in 1933. Now it is our turn to study statistical mechanics. Perhaps it will be wise to approach the subject cautiously."
Image is Chapter 1, section 1.1, page 1. At least you get warned up front.