A 1979 reprint from corrected sheets of the first 1967 edition, following reprints in 1972, 1974 and 1976, these dates listed just to suggest what an influential and important book this was and still remains. It's based on an examination of some 600 sites in Britain, many of them 'out-of-the-way'. Professor Thom makes a special point of thanking 'the many farmers, crofters, shepherds and foresters' who helped him to find them. The book is in pleasingly good condition, with some very minimal spotting to the top edge and a few neat marginal notes in pencil the only features feeling worthy of note. The evocative dust jacket is rubbed and worn along the top edge and at the top corners and is sun-paled on the spine - though this feels rather appropriate, given the book's subject and its focus on the sun.