This is a fascinating 21st century account of Myddfai and a family of Welsh physicians who, according to mythology, had acquired their skills magically. The mythical elements go back into prehistory but the Physicians of Myddfai were real doctors who chose to write their own medical textbook in Welsh at a time when Latin was the established language of learning. Their book acknowledging Greek, Roman and Arab medical literature shows the breadth of culture in Wales at this time. Their words were preserved in Welsh manuscripts together with tales of magic and romance and might have died with them but centuries later were translated into English by a titled Englishwoman, Lady Charlotte Guest. This brought Welsh medieval culture to a wider English audience including Tennyson and her translation of the Mabinogion was an inspiration and source for his Idylls of the Kings. Another of the contributors to the record of the Physician's work was Iolo Morganwg, whose many contributions to Welsh culture were denigrated by some scholars in the 20th century as forgery. As he is the man who gave to Wales its cultural highlight, the National Eisteddfod he cannot be ignored so he too is considered in some detail in a separate chapter.This book goes much further than a mere retelling of ancient medical skills and remedies but details the status and regulation of doctors or mediciners first laid down in the 10th century Laws of Hywel Dda and the ongoing mayhem in Wales - the infighting between the Welsh Princes and the battles for Welsh independence against the Norman and English kings. It also considers the nature of the therapeutic properties of the herbal medicines used by the Physicians as revealed by modern analysis and pays a tribute to the community spirit of present day Myddfai , stiill strong and welcoming although at present (in 2018) without even one resident NHS physician!