When I was a school lad in Dingwall the Brahan Seer was part of our folklore. The Sports House I was assigned to in school was the Red House, Brahan, and were wore a red letter B. I've only within the last year started using some of the Seer tales in my own storytelling. Before that I considered Highland business only. I have some 3 editions of MacKenzies's book. Secondhand bookshops in Scotland usually have a copy somewhere, and it is periodically republished by someone or other. Isobel Sutherland is a noted authority on the Picts and other aspects of the Highlands. Anything she writes is worth reading. I think it was she who also wrote a fictionalised account of the seer under a rather lurid title. If I some across the details I'll post them.