Covers the concepts needed when both sides are bidding for the contract. It introduces preemptive opening bids, overcalls and takeout doubles.

שם הספר
Opening the Bidding (The Official Better Bridge Series: Improving Your Judgement)
Bridge At A Glance
Bridge Basics 3: Popular Conventions (The Official Better Bridge Series)
Bidding in the 21st Century: The Club Series (Acbl Bridge)