Stephen Turnbull is the world's leading English language authority on medieval Japan and the samurai. He has travelled extensively in the far east, particularly in Japan and Korea and is the author of The Samurai - A Military History, as well as numerous books for Osprey.

Wayne Reynolds was born in Leeds, UK, where he also attended art college. He has had a life-long passion for illustration, and since 1991 has worked as a professional artist. Wayne has provided illustrations and source material for many gaming companies, creating figures, landscapes and interiors, as well as providing core characterisation. He is perhaps best known though for his work on titles such as 2000AD, Slaine, and Judge Dredd. A recent arrival to the Osprey stable, Wayne is also a keen modeller and historical re-enactor.

From the 11th century AD, East Asian armies made increasing use of exploding missiles and siege cannon to reduce the fortifications of their enemies. Some of these weapons were very similar to those used in Europe - for example, the heavy siege cannon used in the siege of P'yongyang during the Japanese invasion in the late 16th century. Others, like the Korean hwach'a carts mounting over a hundred rockets that were used to bombard the Japanese at Haengiu in 1593, were very different from their European contemporaries. This book details the design and use of the wide range of weaponry available during this period.