Wow I can only imagine how unwieldy that was to use. Was it just one big list by date published or did they did they try to order by title/author/publisher? Books in Print nowadays is tens of thousands of (mostly garbage) records monthly - I imagine the volume was a lot less back then, but still had to be a lot to sort through on paper.
throw0101b|1 year ago
* https://www.greyhouse.com/Books-In-Print
* https://www.greyhouse.com/bowker-series
* https://www.amazon.com/Books-Print-Set-2024-25/dp/1637009380
ToC (PDF):
* https://www.greyhouse.com/Media/GreyHousePublishing/samples/...
Sample pages (PDF):
* https://www.greyhouse.com/Media/GreyHousePublishing/samples/...