It takes on a large subject by breaking it up into digestible chunks. It starts round the earth ,moves outwards through the solar system,pausing at the interesting areas just beyond then moves out to the galaxy and so on. Brief but authoritative essays at each stage. I particularly liked the sections on the zones just beyond Pluto including where all the comets are parked up and the section on supernovae. A lot of it I had not thought about before and it sparked my interest.
Quite a stimulating read. It brings a lot of things together, setting out ,for example,the importance of prime numbers in cryptography and how this is used in everyday life to make electronic communications secure. It also shows a little of how mathematicians think. Interesting section on whether at the end mathematics is actually true. Not obvious.