Allan Chapman & Patrick Moore 
Patrick Moore’s Millennium Yearbook [PDF ebook] 
The View from AD 1001

In a year that will probably be remembered almost as much for books about the millennium as for the turn of 2000 A.D itself, Patrick Moore’s Millennium Yearbook celebrates…..well, the wrong millennium! This thoroughly entertaining book – which is for everyone, not just astronomers – contains articles on King Alfred’s chronological work, reviews of the new Star Catalogue by the Arab Al-Sufi and the latest edition of Ptolemy’s Almagast. And foreshadowing the change to metric units by 1000 years, the book uses arabic numbers instead of Roman – but there is a conversion table if you have trouble with the idea of "zero" and prefer the older system.