Five years ago, at the age of 65, Heather Morris published her debut novel. It had been 15 years in the making, from its origins as a conversation with an elderly Holocaust survivor called Lali Sokolov, through her failed attempts to write his story as a screenplay, and finally, a novel. The book was called The Tattooist of Auschwitz and it went on to become one of the best-selling books of the 21st century, selling more than 16 million copies worldwide. It is currently being adapted into a six-part Sky television series starring Harvey Keitel as Lali, the tattooist of...