I have two older books which may cater to some interests out there:
SOLD! Thanks, Tim. "Handbook for Star Trackers" by Jim Ballard. Sub-titled "Making and Using Star Tracking Camera Platforms." 1988 Sky Publishing. In good condition; some writing on a few pages, where I jotted down notes. Very nice classic little book that helped me build my first "barn door" and curved-bolt type trackers. Instructions, photos, parts-lists and drawings for building several types of trackers for wider-angle astrophotography. $10 shipped CONUS. MO or PayPal
"A Concise Dictionary of Astronomy," Jacqueline Mitton. 1991 Oxford University Press. Pristine condition, with dust jacket in great shape. Note the older date of this edition. Still a nice addition for a club or personal astro-library. $17 shipped CONUS. MO or PayPal.
Thanks for looking,