In the series by the publishers of "World of Fine Wine" magazine, comes a square shaped, paperback on California. One of currently seven books in the series, each covers a great wine region - and this is no exception. Author's personal choices are thus subjective - to cover all of California would be impossible - but the aim of the book is to highlight excellence - and that is exactly what it does. Assuming you're not paying the £20 cover for any of the titles in the series, they can represent up to date value on certain wine regions in the world - and California is my favourite.
It is not a points out of a 100, or a gazeteer on where to buy - that is up to you to decide - but it does review wineries and explain individuals' motivations for making wine in the wineries covered.