Warrior Queens (Women In History) by Antonia Fraser.
The historical heroines you've never heard of
Much loved: Phillipa of Hainault became Queen Consort of England aged 13 when she married King Edward III IN She was queen for 40 years, acting as regent when Edward left the kingdom.
A biography of the first Tudor queen, who was the only living descendent of Yorkist King Edward IV, and mother of the infamous Henry VIII, sheds new light on the life of this enigmatic woman and mother of the Tudor dynasty.
"After Elizabeth: The Rise of James of Scotland and the Struggle for the Throne of England" by Leanda de Lisle. A great book to help you make the transition from the reign of Elizabeth I to the Stuart age in England.