Dover Castle's English history spans more than 1000 years. Then add its 2nd century AD Roman lighthouse and the remains of an Iron Age hillfort here. This English Heritage guidebook does a magnificent job of condensing this site's strategic significance into 52 pages of text, maps, illustrations, and photos.
This guidebook is packed with information and is doubly useful for its fantastic illustrations, including a cross-section of the castle tower and a brilliant artist's rendering of the castle at its height in the late 13th century.