3 volume observers astronomy library - just �16.99 inc UK mainland delivery (publishers price £24.97).

For this observers 3 volume library set we've selected three of the best guide books available to help you get the most out of your telescope and precious observing time. Together this mini library offers over 350 expertly written pages, fully colour illustrated with photos, diagrams and maps. The library covers the Moon and stars as well as a volume dedicated to targets vastly beyond the solar system covering the deep-sky and includes a wide and beautifully illustrated range of bright easy to find nebulae and galaxies. All at a package price of just £15.99 inc UK mainland delivery - that's over 35% off the published price!

This 3 volume library is a perfect book set for the advancing telescope user. All written in a clear and lucid style, providing guidance on making detailed observations of some of the Universe's most remote and exotic objects.

Library contents:

1. Moon Observer's Guide By Peter Grego (176 pages).

This practical guide for moonwatchers is suitable for the beginner and the more experienced observer. At the heart of the guide is a day-by-day lunar observing diary based on the progress of the terminator (the zone separating lunar day and night). Using sections of moon map for each day, the author explains what to look out for. The day's observing suggestions are divided into three sections, depending on whether you are observing with the naked eye, binoculars or a telescope. A chapter is devoted to the various methods of recording the moon - from pencil sketches to digital CCD images. The author also explains the best way to observe and record eclipses.

2. Star Finder By John Woodruff and Wil Tirion. (64 pages)

A month-by-month calendar for stargazers in the northern hemisphere. Twelve aspects charts show the position of stars and other celestial objects in both northerly and southerly directions for each month of the year. An introduction explains the basic facts of astronomy.

3. Deep Sky Observer's Guide By Neil Bone. (192 pages)

This comprehensive guide is the latest addition to Philip's popular series of observer's guides. Aimed at the relative newcomer to astronomy, it explains in straightforward, non-technical language what is meant by the 'deep sky', and how to observe the universe beyond our Solar System. Many people have been inspired by the incredible images returned from the Hubble Space Telescope and wish to see such objects for themselves. While the views through Earth-based telescopes are not so spectacular as those obtained from space, it is a huge thrill to look at such famous objects as the Triangulum Galaxy or Horse-head Nebula. This has become a very popular activity for sky-watchers.

Each type of Deep Sky object is dealt with chapter by chapter - galaxies, globular clusters, diffuse nebulae, open clusters, double stars, planetary nebulae and supernova remnants. Each chapter recommends a number of objects or 'targets' to view, and the author describes how to find them and what to expect to see, as well as providing important data and tips for drawing or photographing the target.

A complete set of star maps marks all the objects included in the book, and additional charts are provided for targets that are tricky to locate.

Deep Sky Observer contains descriptions of more than 200 deep sky objects, suitable for users of binoculars and small telescopes. Finder charts help to locate the more difficult objects, and a set of star maps is annotated with all the targets described. The book is full colour throughout, with more than 100 photographs and drawings.