Patrick and Yoshie Sherriff are husband and wife who run Tower English language school which they founded in Abiko, Japan, in 2007. Patrick, a former newspaper journalist, has a CELTA from International House London, and has been teaching children as young as one year old with his wife since she set up a playgroup to teach neighbourhood kids a little English. They have now taught close to 1,000 Japanese children of all ages. This is their fourth textbook. They are working on more in this series, one for every year group from age three to age 16.