This work is about bidding at duplicate bridge. An effort has been made to be certain that the concepts, the conventions, and the treatments used are not only written clearly but are backed up by bidding examples and an extensive glossary. The target of this work is the moderately experienced player who, along with a partner, wishes to elevate thier level of bidding. Playing this system a partnership is not likely to feel that their bidding system is inferior compared the the systems of whoever their opponents may be. The conventions and treatments presented conform to the ACBL's General...