Astronomy in Depth is more than just a textbook. It covers pre-university level Astronomy courses (in the UK, the GCSE syllabuses) and provides numerical examples to help students, but is also an ideal introduction for amateur astronomers. Many hobbyists "pick it up as they go along" without ever properly getting to grips with the science; this book is both a prevention and cure - perfect as a starting point, and equally useful to fill in concepts that long-time amateurs have missed.
