The Old Straight Track: Its Mounds, Beacons, Moats, Sites and Mark Stones is a book by Alfred Watkins, first published in 1925, describing the existence of alleged ley lines in Britain.
Watkins presents a methodical and thorough exposition of his theories of ley lines, following an earlier much shorter publication, "Early British Trackways" (1922). The book has a preface, thirty chapters, four appendices and an index. There are many figures, and photographs taken by the author.
The book is considered the first book written about leys, and the first book to document and map alleged ley lines in Britain, primarily southern England.
The book was disregarded by archaeologists but saw a resurgence of interest with the rise of New Age ideas in the 1960s. Watkins' ideas also influenced contemporary psychogeography, including Iain Sinclair's Lud Heat (1975), which in turn influenced Peter Ackroyd's novel Hawksmoor (1985).
The book was reprinted as ISBN on April 2, 1994 by "Abacus". Editions or reprints were published in 1925, 1933, 1945, 1948, 1970, 1974 and 1994. The Abacus edition of 1970 was reprinted up to 1999 at least, and carries a copyright dated 1970 "Allen Watkins and Marion Watkins".