Just got my copies of
Zetetic Cosmogeny by Thomas Winship and
A Reparation: Universal Gravitation a Universal Fake by C.S. DeFord, both of which are still available in pretty excellent condition:

I hope to eventually get the latter book scanned and available for download, but for now I'm just going to post the author's preface, which I think is an especially poignant expression of the values which bind and drive Zetetics:
Authors Preface
To me truth is precious. I love it. I embrace it at every opportunity. I do not stop to enquire, Is it popular? ere I embrace it. I inquire only, Is it truth? If my judgement is convinced my conscience approves and my will enforces my acceptance. I want truth for truth's sake, not for the applaud or approval of men. I would not reject truth because it is unpopular, nor accept error because it is popular. I should rather be right and stand alone than run with the multitude and be wrong.
The holding of the views herein set forth has already won for me the scorn and contempt and ridicule of some of my fellowmen. I am looked upon as being odd, strange, peculiar; as being a little weakminded; as having a broken wheel or slipping cog in my mental machinery. But truth is truth and though all the world reject it and turn against me, I will cling to truth still.
I am deeply grateful to Mrs. A.C. Caldwell, Tieton, Washington, and all others who indorse my views and who have contributed so generously their financial support.
I shall be pleased to receive any fair, kindly, courteous criticism of these views from any of my readers. But pleae read the little volume through before you condemn it or its author.
Yours for enduring truth,
C.S.D.