I thought this might be useful to those interested in Poland:
Political Thought in Renaissance Poland: An Anthology in English
translated, introduced and annotated by Harold B. Segel ISBN: 0-940962-61-6
$18.00 ($15.30 for PIASA members)
"shipping and handling: $2.50 for first book, .50 for each additional book (USPS
media rate); $3.50 for first book, .50 for each additional book (USPS priority)
Make checks out to PIASA; credit card orders also accepted at (212) 686-4164"
There is also a journal, The Polish Review, that might be of use to folks. The last couple of issues seem to be mostly modern topics, but there might be something of use in earlier issues.
In service, I remain