I think that this is a superb book full of basic and useful astronomical information, and it is small enough to pack whenever I go on holiday. The star maps are comprehensive and clearly labelled with a very good explanation in the first section of the book. There are also a lot of explanations about star types, galaxies and other things in the sky.
I bought this book to replace a copy that I have had since 1996 because I wanted the updated ephemera on planetary oppositions but it is more than worth it for the information that has been added since then on galaxies and our place in the Milky Way. A real gem at the price.