Dates and times
At the end of the Tudor era, two queens ruled one island.
Elizabeth and Mary shared the struggle to be both woman and queen. But the forces rising against the queens regnant, and the conflicts of love and dynasty, drove them apart.
For Mary, Elizabeth was a fellow queen with whom she dreamed of a lasting friendship. For Elizabeth, Mary was a threat. It was a schism that would end in secret assassination plots, devastating betrayal and, eventually, a terrible final act.
Rival Queens is the latest book from best-selling historian and broadcaster Kate Williams.
Chaired by Janet Smyth of the Edinburgh International Book Festival