1. Navigating the night sky
These books generally have star charts and simply explain how and when to find the 88 known constellations. "A Walk Through the Southern Sky" is a good example, and highly recommended.

2. Euphemeris
Usually published annually, these books predict events such as planet paths, comets, meteor showers, etc. "Astronomy 2006" is an Australian publication we highly recommend.

3. Telescopes
These books explain telescopes and how they work. "Using the Meade ETX" is a book we highly recommend for all new ETX owners.

4. Astronomy
These books generally explain the science of Astronomy. "Astronomical Algorithms" is one example.