If you read French and are willing to do some work, Caillet gives an extraordinary survey of the occult world at the end of the nineteenth century. This is a carefully-described list, with prices, of the vast majority of occult books available at the time, with little biographies of the authors. Expensive.
Although this is really a history of what is now known as Wicca, the whole first half is devoted to Wicca’s nineteenth-century roots, and is extremely useful. Hutton is also a first-class scholar, and his notes are a goldmine.