I've recently finished reading two very good books. The first is Inscribed Across The Landscape by Roy Loveday, which covers cursuses and long enclosures etc. The second is Earthern Long Barrows by David Field.
Both are rather academic, but quite accessible and crammed full of information. Both hold a lot of surprises* and interesting stuff and are well worth reading.
*Especially if you know as little about cursuses & long barrows as I did before reading this!