He has written several popular introductions to Peak District geology, a definitive study of the local fluorite Blue John, as well as numerous cave guides.
John F. Kennedy | Pope John Paul II | Elton John | John | John Lennon | Derbyshire | John Wayne | John McCain | John Kerry | John Cage | Olivia Newton-John | John Williams | John Peel | John Adams | John Steinbeck | NYPD Blue | John Travolta | John Milton | John Zorn | Toronto Blue Jays | John Marshall | John Howard | John Singer Sargent | John Ruskin | Blue Peter | John Updike | John Maynard Keynes | John Coltrane | John Cleese | St. John's |