John (1166-1216), the youngest son of King Henry II and Eleanor of Aquitaine, was not expected to become king. When King Henry II divided his lands in Britain and France among his sons, John was very young and not included. This caused him to be given the nickname, Lackland, by family members. For much of his life John lived in the shadow of other family members, especially his brother, Richard the Lionheart.
Shortly after John's brother, Richard became king, King Richard I took part in the Third Crusade (1190-1192). John eventually ruled England, especially when money was needed to pay the ransom after Richard was captured on the way home from the Crusade. Richard returned to England for a few months before spending the rest of his life in Normandy until his death in 1199. John then officially became King John of England and his family's lands in France.
John faced many challenges during his reign especially the opposition he faced from many of the barons, from the Church hierarchy, including the Pope, and from the people who objected to the increased taxes imposed to fund his attempts to win back his French lands lost in France. The French king was also threatening to invade England and there were problems in other territories, especially, Ireland, Wales and with the Scots.
Unfortunately John strongly believed in the tradition of sovereign power which he found impossible to sustain in a time of unrest and demands for change. After losing the French possessions, the subsequent First Barons' War (1215-1217) divided the country and several months later Prince Louis of France arrived on the southern coast of England and with the assistance of some of the barons took over London. Eventually King John and the barons met to create a document that became known as the Magna Carta.
In King John and the Road to the Magna Carta, Stephen Church provides a detailed study of the events that led to a change in the power of the monarchy plus the prelude to the eventual creation of a parliament. Detailed notes and bibliography can be found at the end of the book.