This upcoming release from William Kiesel of Ouroboros Press sounds very promising:
Magic Circles have been depicted in popular expressions of magic and witchcraft as well as detailed with full rubrics in traditional manuals of magic such as the Clavicula Solomonis or Liber Juratus. Using narrative, visual and textual material available from European grimoires and manuscripts, the author discusses the various forms and functions of this important piece of apparatus employed by magicians in the Western Esoteric Tradition, including their role in providing authority and protection to the operator, as well as examples of their use in divination and treasure finding. Additionally, contemporary examples of the magic circle at work in modern esoteric praxis are provided and discussed in light of the traditional approaches they exhibit.
The graphic elements of magical works are often omitted when these works are reprinted, and an examination of them is long overdue. The site lists “late June” as the release date, and pre-orders are being accepted.