Ostensibly this is a biography of Nicholas Culpeper, but I'm not sure this book knows what it wants to be. The author admits as much in the preface, mentioning the dearth of extant biographical material to work with which immediately negates what follows. As the story progresses one then begins to wonder whether this is a history of the English Civil War? or perhaps of the College of Physicians? or perhaps a biography of William Harvey? who features far more frequently than does Culpeper. The language was also a problem for me. The author frequently includes 17th-century prose into the body of the text instead of separating it out which makes for a turgid read with plenty of sub clauses and endless qualifications and meanderings. I'm in favour with quoting from primary sources, and even with the original spellings and grammar, but in moderation and not just for the sake of quoting - for some purpose. Apart from that it's still worth a look.