Astronomical Sketching: A Step-by-Step Introduction (The Patrick Moore Practical Astronomy Series)
From the reviews:"Sketching is the best way to train the eye for visual observation and it enhances an observer’s enjoyment of the night sky. This book is aimed at those who would like to discover and develop sketching techniques. The five experienced authors describe their areas of specialty, with chapters on sketching the Moon, comets, the Sun, planets, star clusters, nebulae and galaxies. … In all, it’s a super book." (Peter Grego, BBC Sky at Night, December, 2007)