This book covers an overview topic of what is popularly referred to as Rocket Science, seen as a daunting topic, but not completely incomprehensible. This is targeted to the non-specialist. I am not a rocket scientist, but I know a lot of them. I are a Rocket Engineer. I'll explain the difference later.The popular impression of "rocket science" as well as astrophysics is they are topics too complex for the lay-person. Well, if you want to work in the field, you will require a lot of physics, math and engineering at the graduate level. If you just want to understand and appreciate the topic, it's not that bad. This book could be used in a STEM Program, but it is not targeted to that exclusively. The author does have a book published on Cubesats in the STEM curriculum.