The Fiery Spirits tells the story of the MPs and protestors who played a pivotal role in the English Civil Wars. At the start of the wars, very few would have imagined that the country would soon become a republic. Yet Henry Marten and his fellow MPs, nicknamed The Fiery Spirits, formed the nucleus of a movement that defeated the king politically and militarily and changed the country forever.

John Rees is a Visiting Research Fellow at Goldsmiths, University of London and author of "The Leveller Revolution".