Welcome to the Universe: An Astrophysical Tour by Neil deGrasse Tyson My rating: 5 of 5 stars Given that I am a layperson and my calculus is far behind me, I still believe that I was conceptually able to grasp at least a quarter of the matter in the book, the rest remaining “dark matter” for me, existent, imaginable but not yet graspable. The authors do a great job of explication, but this still means that thus is a challenging book. I do feel that my understanding of the process behind E=mc2 for instance rose to a higher level as a result of spending quality time with these 3 intelligent and witty men. View all my reviews