Players are generally aware of the fact that accurate signalling plays a key role in conducting a successful defence. In tournament bridge, especially, it is vital for the defenders to extract every ounce of value from the cards they have at their disposal. This book tells you how to do it. In a survey, the author covers every aspect of this difficult subject, introducing you to unusual signals. You may decide in the end that some of the subtler methods are not for you, but you may be stimulated by many of the ideas. Danny Roth also wrote "Winning Play".