25 Bridge Conventions You Should Know: Sophisticated Stuff

Based on the best-selling book 25 Bridge Conventions You Should Know, "part 3: Sophisticated Stuff" includes the following conventions:
Chapter 18: Lebensohl
Chapter 19: Reverse Drury
Chapter 20: Roman Key Card Blackwood
Chapter 21: Fourth-suit forcing
Chapter 22: New minor forcing
Chapter 23: Ogust responses to weak two-bids
Chapter 24: Responsive doubles
Chapter 25: Lead-directing doubles
For the remaining conventions, look for these titles:
25 Bridge Conventions You Should Know - Part 1: Learn These First
25 Bridge Conventions You Should Know - Part 2: More Complicated