In Blood and Religion Ronald Love explores the symbiosis of religion and politics in the early career of Henri IV of France, examining the king's strong religious beliefs - imbibed in early youth from his mother, Jeanne d'Albret, queen of Navarre - and the profound effect they had not only on his private conscience but on his political and military decisions as Huguenot leader and French monarch. Fundamental aspects of Henri's developing character, his motivations and leadership, and the contemporary conditions under which he laboured are scrutinized from his birth in 1553 to the opening years of his reign.

Love places these matters in context against the broader background of endemic civil war, contemporary religious culture, and the many responsibilities imposed upon Henri by his royal rank and political role. Blood and Religion concludes with a close analysis of Henri's conversion to Catholicism in July 1593, including the king's crisis of conscience as he struggled to secure his crown and preserve his soul. Love's fresh interpretations of the influence of religion on Henri IV's political and military choices challenge much of modern scholarship on this important French monarch and cast new light on the motivations and worldview of sixteenth-century sovereigns in an age when religion and politics were inseparable.