Acol has been the most popular system of bidding in Britain for over 50 years. New ideas are constantly proposed and tested and new styles have been developed in many areas, such as Swiss game raises and the control-asking 4NT. In this book the authors describe many relatively new techniques in a system which is essentially practical and equally well suited to all forms of the game. The bidding style they advise is not difficult to master and is capable of carrying any pair to the highest level.