Past biographies have always dismissed Pamela Harriman as a socialite who slept her way to the top, in a series of affairs and marriages that boosted her thirst for power.

But Sonia Purnell argues persuasively that Harriman was in fact one of the most significant diplomats of the 20th century and that her motives were always those of ensuring peace and the best possible outcomes for the UK, the US and the world. She deployed her charms and incredible power of seduction on everyone from Randolph Churchill to Gianni Agnelli, the Aga Khan, Ed Murrow, Bill Paley and Averell Harriman, moving from politics to the world of Broadway by marrying producer Leland Heyward and hosting a salon in Washington that became the epicentre of the world of intelligence and refinement. Even the Russians were not immune to her charms.

How did a minor British aristo with no formal education come to be so influential? Purnell’s juicy biography, Kingmaker, is a fascinating and deliciously gossipy but serious portrait of a bygone world of glamour and intrigue, high stakes secrets, scandalous love affairs and strategic partnerships in and out of the bedroom of one of the world’s most intriguing women.

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