Upon return from holiday, I learned that Ian Mueller and David Hull had died during last few days.
In an earlier discussion on this list I had listed Mueller's Philosophy of Mathematics and Deductive Structure in Euclid as one of the most important contributions to HPS since the 1980s:
What I did not know then is that Dover reprinted Mueller's book, so it is easily and cheaply available.
I had failed to include Davide Hull's *Science as a Process*, which is a landmark in HPS work of the era; it's empirical, reflexive, very informed and offers a challenging account of scientific practice. It is also widely discussed (760 hits on scholar.google), and, thus, was surprisingly left out of my original list; unaccountably it then went unmentioned in the learned discussion.