This is the Patrick Moore\'s Astronomy Series ebook collection, almost complete to December 2010. 46 ebooks in PDF format. 

Complete list of ebooks:

+ Amateur Telescope Making in the Internet Age. Finding Parts, Getting Help, and More - 10.1007/978-1-4419-6415-1
+ Hunting and Imaging Comets - 10.1007/978-1-4419-6905-7
+ Choosing and Using a Refracting Telescope - 10.1007/978-1-4419-6403-8
+ Go-To Telescopes Under Suburban Skies - 10.1007/978-1-4419-6851-7
+ 1,001 Celestial Wonders to See Before You Die. The Best Sky Objects for Star Gazers - 10.1007/978-1-4419-1777-5
+ A User’s Guide to the Meade LXD55 and LXD75 Telescopes - 10.1007/978-0-387-68264-8
+ The Rainbow Sky. An Exploration of Colors in the Solar System and Beyond - 10.1007/978-1-4419-1053-0
+ Viewing the Constellations with Binoculars. 250+ Wonderful Sky Objects to See and Explore - 10.1007/978-0-387-85355-0
+ The Science and Art of Using Telescopes - 10.1007/978-0-387-76470-2
+ Starlight. An Introduction to Stellar Physics for Amateurs - 10.1007/978-1-4419-0708-0
+ The 100 Best Targets for Astrophotography. A Monthly Guide for CCD Imaging with Amateur Telescopes - 10.1007/978-1-4419-0603-8
+ Deep-Sky Video Astronomy - 10.1007/978-0-387-87612-2
+ Astronomical Cybersketching. Observational Drawing with PDAs and Tablet PCs - 10.1007/978-0-387-85351-2
+ Measure Solar System Objects and Their Movements for Yourself! - 10.1007/978-0-387-89561-1
+ Make Time for the Stars. Fitting Astronomy into Your Busy Life - 10.1007/978-0-387-89341-9
+ Building a Roll-Off Roof Observatory. A Complete Guide for Design and Construction - 10.1007/978-0-387-76611-9
+ Choosing and Using a New CAT. Getting the Most from Your Schmidt Cassegrain or Any Catadioptric Telescope - 10.1007/978-0-387-09772-5
+ The Night Sky Companion. A Yearly Guide to Sky-Watching 2009-2010 - 10.1007/978-0-387-79509-6
+ Field Guide to Meteors and Meteorites - 10.1007/978-1-84800-157-2
+ How to Photograph the Moon and Planets with Your Digital Camera - 10.1007/b137522
+ Setting-up a Small Observatory: From Concept to Construction - 10.1007/978-0-387-68621-9
+ Aurora. Observing and Recording Nature’s Spectacular Light Show - 10.1007/978-0-387-68469-7
+ Astronomical Sketching: A Step-by-Step Introduction - 10.1007/978-0-387-68696-7
+ Observing the Sun with Coronadoâ„¢ Telescopes - 10.1007/978-0-387-68127-6
+ Lights in the Sky. Identifying and Understanding Astronomical and Meteorological Phenomena - 10.1007/978-1-84628-761-9
+ Making Beautiful Deep-Sky Images. Astrophotography with Affordable Equipment and Software - 10.1007/978-0-387-71353-3
+ The Complete CD Guide to the Universe. Practical Astronomy - 10.1007/978-0-387-46895-2
+ The Night Sky Companion - 10.1007/978-0-387-71609-1
+ Spectroscopy: The Key to the Stars. Reading the Lines in Stellar Spectra - 10.1007/978-0-387-68288-4
+ Astrophysics is Easy! An Introduction for the Amateur Astronomer - 10.1007/978-1-84628-736-7
+ Real Astronomy with Small Telescopes. Step-by-Step Activities for Discovery - 10.1007/1-84628-508-9
+ A Buyer’s and User’s Guide to Astronomical Telescopes & Binoculars - 10.1007/978-1-84628-707-7
+ Pattern Asterisms: A New Way to Chart the Stars - 10.1007/1-84628-476-7
+ Binocular Astronomy - 10.1007/978-1-84628-788-6
+ Creating and Enhancing Digital Astro Images - 10.1007/978-1-84628-703-9
+ The Urban Astronomer’s Guide. A Walking Tour of the Cosmos for City Sky Watchers - 10.1007/1-84628-217-9
+ Human Vision and the Night Sky. Hot to Improve Your Observing Skills - 10.1007/978-0-387-46322-3
+ CCD Astrophotography: High Quality Imaging from the Suburbs - 10.1007/0-387-33138-7
+ Lunar and Planetary Webcam User’s Guide - 10.1007/1-84628-199-7
+ Visual Astronomy in the Suburbs. A Guide to Spectacular Viewing - 10.1007/b97514
+ Observing and Measuring Visual Double Stars - 10.1007/b97664
+ Care of Astronomical Telescopes and Accessories. A Manual for the Astronomical Observer and Amateur Telescope Maker - 10.1007/b138280
+ The Observer’s Year. 366 Nights of the Universe - 10.1007/1-84628-155-5
+ Astronomy with a Home Computer - 10.1007/b138450
+ Digital Astrophotography: The State of the Art - 10.1007/1-84628-256-X
+ Visual Astronomy Under Dark Skies. A New Approach to Observing Deep Space - 10.1007/1-84628-149-0