Could anybody suggest a book for "competitive bidding" for SAYC ? I feel it is very confusing. I want to specify my need as clear as I can. By "competitive bidding" I don't mean by "defensive bidding", like how to make overcall or take-out double. It is also very nice if someone recommend a book on defensive bidding though.
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But by "competitive bidding", I really mean is how to handle the interference like "overcall" when we open the bidding. I found some tutorials only give a vague meaning of bids in a competitive bidding sequence, not as precise as constructive bidding. Most of these tutorials focus on conventions, like Unusual NT or negative double. But the part I'm most interested in is the exact meaning of the natural bids, i.e. the lower and upper limits and the shape promised by a bid, such as I learned for only constructive bid.