I had been looking for an astronomy encyclopaedia for some time, as I am studying for an Open University astrophysics degree, when I happened upon this excellent work. This book is simply fantastic - every entry is clearly written, highly accurate, and bang up-to-date at the time of its publication. The book is lavishly illustrated (mainly in colour). It is appropriate for the general reader, the amateur astronomer, the undergrad who wants a reliable reference source, and anyone with an interest in the myriad of curiosities that make up our Universe. Hats off to the authors.