“The book is full of very useful information for the dedicated comet hunter, not just for the comets that attain visual magnitudes, but for those that are no more than a smudge, barely visible through a small telescope against the stellar background. … Any serious comet observer will want this book in their arsenal … .” (Malcolm Gough, The Observatory, Vol. 138 (126), June, 2018)“Seargent, a former part-time lecturer in philosophy at the University of Newcastle, Australia, makes the convincing case that any individual can make valuable observations with little more than a commitment to learning about comets and how to properly document what is observed. His book begins with a very readablehistory of comets, their anatomy, and their behavior. … If one is interested in comets, get out there and take this book along! Summing Up: Recommended. All readers.” (T. D. Oswalt, Choice, Vol. 55 (2), October, 2017)