Based on the best-selling book 25 Bridge Conventions You Should Know, "part 3: Sophisticated Stuff" includes the following conventions:Chapter 18: LebensohlChapter 19: Reverse DruryChapter 20: Roman Key Card BlackwoodChapter 21: Fourth-suit forcingChapter 22: New minor forcingChapter 23: Ogust responses to weak two-bidsChapter 24: Responsive doublesChapter 25: Lead-directing doublesFor the remaining conventions, look for these titles:25 Bridge Conventions You Should Know - Part 1: Learn These First25 Bridge Conventions You Should Know - Part 2: More Complicated