She is an astute young Housekeeper, with a ten-year-old son, who is hired to care for him.

Each morning, the Professor and the Housekeeper are introduced to one another. The Professor may not remember what he had for breakfast, but his mind is still alive with elegant mathematical equations from the past. He devises clever maths riddles - based on her shoe size or her birthday - and the numbers reveal a poetic world to both the Housekeeper and her son.

With each new equation, the three lost souls forge an affection more mysterious than imaginary numbers, and a bond that runs deeper than memory.

Yoko Ogawa has won every major Japanese literary award. Her fiction has appeared in the New Yorker, A Public Space and Zoetrope. Her works include The Diving Pool, The Housekeeper and the Professor, Hotel Iris and Revenge. Her most recent novel, The Memory Police, was shortlisted for the International Booker Prize.