This is the book of the brilliant TV series. The book is both easy and difficult to read. I found it quite hard to try to read it from cover to cover because I'd seen the programmes anyway. But it is a brilliant book for dipping into. SO IF YOU DON'T REALLY LIKE READING, THIS IS THE BOOK FOR YOU! There are lots of interesting details. My favourite thing was learning what a "geoid" was for the first time. So - a great book to borrow, dip into and bring back.