Justin de Quincy Series by Sharon Kay Penman

It's 1193, and King Richard has disappeared on his way back to England after fighting in the Crusades. Justin de Quincy, the well-educated but illegitimate son of a bishop, is tapped to search for the missing ruler, and he turns out to be just the chap to blow away the cobwebs that often hang over historical mystery.

April 1193. England’s King Richard Lionheart languishes in a German prison, and treason scents the air. Richard’s younger brother, John, seizes Windsor Castle, and Dowager Queen Eleanor of Aquitaine summons her trusted personal “queen’s man,” Justin de Quincy, to do the impossible– mediate a truce with her rebel son. Amid such fateful events, the murder of a Welsh peddler’s daughter seems small... moreApril 1193. England’s King Richard Lionheart languishes in a German prison, and treason scents the air. Richard’s younger brother, John, seizes Windsor Castle, and Dowager Queen Eleanor of Aquitaine summons her trusted personal “queen’s man,” Justin de Quincy, to do the impossible– mediate a truce with her rebel son. Amid such fateful events, the murder of a Welsh peddler’s daughter seems small. But the cruel demise of the beautiful Melangell so troubles Justin that not even a threatened French invasion can keep him from investigating her death. Yet can he bring Melangell’s craven killer to justice? less

July 1193. King Richard Lionheart lies in a German prison, held for ransom by the emperor. His mother, Dowager Queen Eleanor, ransacks England for gold to buy his freedom, while his younger brother, John, plots with King Philippe of France to ensure that he rots and dies in chains. When a ransom payment vanishes, Eleanor hastily dispatches young Justin de Quincy to investigate... moreJuly 1193. King Richard Lionheart lies in a German prison, held for ransom by the emperor. His mother, Dowager Queen Eleanor, ransacks England for gold to buy his freedom, while his younger brother, John, plots with King Philippe of France to ensure that he rots and dies in chains. When a ransom payment vanishes, Eleanor hastily dispatches young Justin de Quincy to investigate. In wild, beautiful Wales, his devotion to the queen will be supremely tested-as an arrogant border earl, a cocky Welsh prince, an enchanting lady, and a traitor of the deepest dye welcome him with false smiles and deadly conspiracies. The queen's treasure is nowhere to be found, but assassins are everywhere . . . and blood runs red in the dragon's lair. "From the Trade Paperback edition." less

From the New York Times bestselling author of Time and Chance comes the much-anticipated fourth novel in her acclaimed medieval mystery series.