The Revolt of the Eaglets

The second book in Jean Plaidy's epic Plantagenet series
News of Thomas a Becket's martyrdom has spread throughout Christendom and the blame is laid at the feet of Henry Plantagenet, King of England. Two years later, with Becket canonised, Henry's position is precarious: punished at the Pope's insistence for his part in Becket's death, he now also has an enemy in his Queen, Eleanor of Aquitaine, after her discovery of his longstanding infidelity with Rosamund Clifford. Eleanor is determined to seek vengeance, so, with King Philip of France, she encourages her sons to conspire, both against their father and each other.
Much embattled, the old eagle Henry struggles to fend off both rebellion and the plots of his aggressively circling offspring...