The hidden controversy and heartbreak behind Stevenson's Strange Case of Dr Jekyll and Mr Hyde is revealed in this fascinating work of literary detection.

What was the real reason Robert Louis Stevenson dedicated his dark masterpiece to his cousin Katharine de Mattos?

Why was Katharine's own tale of duality published under a pseudonym?

When Fanny Stevenson 'stole' another story idea from Katharine, why did RLS explode with Hydelike rage at the cousin for whom he had once been 'the one that loves you - Jekyll, and not Hyde'?

Featuring the full text of Katharine's tale of duality, Fanny's stolen story and another tale revealing Katharine's grief at losing her cousin's love forever, Mrs Jekyll & Cousin Hyde sheds new light on one of the greatest Victorian authors.