According to the Introduction: ‘Sir Walter Scott’s ‘Letters on Demonology and Witchcraft’ were his contribution to a series of books, published by John Murray, which appeared between the years 1829 and 1847, and formed a collection of eighty volumes known as ‘Murray’s Family Library.’ The series was planned to secure a wide diffusion of good literature in cheap five-shilling volumes, and Scott’s ‘Letters, ‘ written and published in 1830, formed one of the earlier books in the collection.’