This is a colourful gazeteer of many of the prehistoric monuments in Cornwall and the Isles of Scilly and is very attractive with lots of colour photos. It also has a useful long introduction to the sites and the time periods they represent.
However, for those who know the book in its previous incarnations, 'Bolerian' and 'Cornovia', it's not entirely in keeping with the blurb which states that this new edition is a combination of the earlier books. It isn't entirely, because numerous sites are missing that were there in the originals. For example, in the West Cornwall section (the previous 'Bolerian'), all the stone crosses are omitted - the author states there are too many to make room for - but numerous other sites are left out as well. It is a little disingenuous therefore to also describe the book as one of the most comprehensive on the subject. Maybe I'm a completist and this matter might not bother those who don't know the earlier books (which I still find myself referring to). However, the new book has some updated material for some of the sites, and also a few corrections, especially such as measurements.