The Ever-Changing Sky: A Guide to the Celestial Sphere
"[A]n excellent discussion of the variations in solar time.  This is essential material for understanding sundials."   Joe Heafner, Sky & Telescope"It develops into a comprehensive treatment of all aspects of the sky that could be useful to astronomers, whether they are professionals, amateurs, or students, and to general readers who simply wish to learn about the night sky...a thoroughly enjoyable read."   Astronomy