I bought this book in Chester Cathedral bookshop about a month ago. Since then I have carried around in my handbag - it fits beautifully.
Each double-page spread consists of an (often subtly humerous) illustration and accompanying text. It is organised starting with the largest-scale, furthest features in the universe, gradually approaches earth, and covers topics such as relativity in an extremely well-thought-out, approachable way in excellent prose.
The book is also fully recyclable (in the unlikely event you do not enjoy it) and has a beautiful cover illustration with the word 'Cosmos' picked out in subtly reflective silver.
All in all, one of the most fascinating books I have ever come across, and possible my favourite book of all time. Buy it now!