Books in Astronomy (sorted by popularity)
- Sir William Herschel: His Life and Works Edward S. Holden 124 downloads
- Le Système Solaire se mouvant (French) August Tischner 118 downloads
- The Martyrs of Science, or, The lives of Galileo, Tycho Brahe, and Kepler David Brewster 116 downloads
- Astronomical Instruments and Accessories William Gaertner and Company 102 downloads
- Are the Planets Inhabited? E. Walter Maunder 100 downloads
- Half-hours with the Telescope Richard A. Proctor 92 downloads
- Other Worlds Garrett Putman Serviss 90 downloads
- Watchers of the Sky Alfred Noyes 78 downloads
- The Future of Astronomy Edward C. Pickering 72 downloads
- Side-Lights on Astronomy and Kindred Fields of Popular Science Simon Newcomb 64 downloads
- The Tides and Kindred Phenomena in the Solar System Sir George Howard Darwin 51 downloads
- Scientific Papers by Sir George Howard Darwin. Volume V. Supplementary Volume Sir George Howard Darwin 39 downloads
- Publications of the Astronomical Society of the Pacific, Volume 1 Astronomical Society of the Pacific 38 downloads