“I found it to be very readable and an interesting introduction to the field of astrodynamics. I think it succeeds in its intention to emphasize the similarities between celestial mechanics and astrodynamics as well as the problems involved in dealing with real data. It is well-illustrated and is supported by good reference material. … the authors are to be congratulated on generating an excellent text-book which should find its place on any astronomer’s bookshelf.” (Steve Bell, The Observatory, Vol. 137, August, 2017)“This book combines the two disciplines in the aerospace community. … The strength of the book lies in its comprehensive illustrations of mathematics, figures and modern developments. … this book can serve as a good guide to exploring the numerical work in astrodynamics.” (Chih-Yueh Wang, Contemporary Physics, Vol. 58 (3), July, 2017)