Royal unions have always been the stuff of scintillating gossip, from the passionate Plantagenets to Henry VIII's alarming head count of wives and mistresses, to the Sapphic crushes of Mary and Anne Stuart to the scandal-blighted coupling of Prince Charles and Princess Diana. Thrown into loveless, arranged marriages for political and economic gain, many royals were driven to indulge their pleasures outside the marital bed, engaging in delicious flirtations, lurid love letters and rampant sex. On these pages the arousing history comes alive.