“The Practical Astronomer’s Deep-Sky Companion” by Jess K. Gilmour is a comprehensive textbook on astronomy and sky observation published by Springer London. This trade paperback book, part of “The Patrick Moore Practical Astronomy Series,” covers various topics related to deep-sky astronomy in an accessible narrative. Written in English and spanning 146 pages, the book provides valuable insights for both beginners and advanced astronomy enthusiasts looking to deepen their understanding of the night sky. With detailed explanations and practical tips, this book serves as a valuable resource for those interested in exploring the wonders of the universe.