For many parents, the opening lines of The Tiger Who Came to Tea are very familiar.
The work, published in 1968, has been read by several generations and tells the story of a tiger who invites himself to tea and eats and drinks all the food and water in Sophie's house. He then leaves, never to return.
"I told it to her again and again and again, and she used to say, 'Talk the tiger'."
Kerr, who turned 90 this year, loved visiting the zoo with her daughter Tacy, and particularly liked looking at the "beautiful" tigers.
"When I decided to do the book, I remember wondering what the tiger should look like, whether he should have clothes."
Kerr grew up in a loving family in pre-World War Two Berlin. Her mother Julia was a composer and her father, Alfred Kerr, a Jewish intellectual and theatre critic. They realised the impending threat from Hitler and Nazi Germany, and publicly criticised the regime.