This is only a slim volume, but it is packed with information.
It can be divided into thirds. The first part deals with Maeshowe, a neolithic building that can be visited on guided tours. Apart from the neolithic characteristics, it features Norse runes (graffiti) - it is supposed that Viking groups sought shelter here on numerous occasions.
The second part provides an overview and details about other Neolithic structures, such as the Stones of Stenness, the Ring of Brodgar and Skara Brae.
The third part includes information on the Neolithic age in general, how the Orcadians might have lived during that time, the various excavations and today's research, and Orkney's Neolithic connections to other places on the British Isles, most of all the Boyne Valley in Ireland.
The book also features a lot of fascinating pictures, timelines, maps etc.
Of course, as it is such a short book, most topics can only be touched upon, but it is really good for what it is. ( )