I have a framed print of the Hereford mappae Mundi given to me at an early age by my Uncle. I had a basic knowledge of the contents of this map, but Reed Kline really illuminated the context and history of the mappae mundi to me. Starting with a discussion on the circular map in this era, it also looks at how these pieces of art were displayed in religious settings.
Their prominent case study is the Hereford Map, which they dissect with cogent analysis that was jam packed with interesting takes on a subject often explored or referenced. In addition, it has multiple annotated maps of the Hereford mappae mundi, showing locations, beasts and peoples depicted on the Hereford Mappae Mundi.
Good for introducing yourself this field of study, great as a guide to the Hereford map.