Takayo Akiyama is the author of several books and the illustrator of Where's Ringo?. Bruno Vincent is the author of humour titles including the Grisly Tales from Tumblewater series and the Enid Blyton For Grown Ups series. Stephen Turnbull is a writer and historian, specializing in military history, particularly of Japan and East Asia. He is Honorary Lecturer in Japanese Religion at Leeds University and Visiting Professor of Japanese Studies at Akita International University in Japan. He is the author of over seventy books, including Samurai: The Japanese Warrior's (Unofficial) Manual (2012), published by Thames & Hudson. Turnbull gave the inaugural lecture for the establishment of the International Centre for Ninja Studies at Mie University, Japan, and acted as historical advisor for the 2013 film 47 Ronin.