Yvain is one of Less Wrong's best and most prolific writers. I suspect many Less Wrongers haven't read his posts. Here's an index of Yvain's articles (not including meta posts, ranked by upvotes (like on my post index):

• Generalizing from One Example (176)
• Diseased Thinking: Dissolving Questions about Disease (154)
• Eight Short Studies on Excuses (137)
• Confidence Levels Inside and Outside an Argument (97)
• The Least Convenient Possible World (96)
• Intellectual Hipsters and Metacontrarianism (94)
• The Apologist and the Revolutionary (92)
• Are Wireheads Happy? (89)
• Doing Your Good Deed for the Day (85)
• Efficient Charity: Do Unto Others... (78)
• Defense Against the Dark Arts: Case Study #1 (72)
• How to Not Lose an Argument (71)
• A Parable of Obsolete Ideologies (71)
• Extreme Rationality: It's Not That Great (70)
• Shut Up and Guess (64)
• Simultaneously Right and Wrong (62)
• Beware Trivial Inconveniences (61)
• The Trouble with 'Good' (60)
• That Other Kind of Status (57)
• Never Leave Your Room (54)
• Guilt: Another Gift Nobody Wants (52)
• Missing the Trees for the Forest (50)
• Techniques for Probability Estimates (50)
• The Mystery of the Haunted Rationalist (50)
• Offense Versus Harm Minimization (49)
• The Power of Positivist Thinking (46)
• When Truth Isn't Enough (44)
• Book Review: The Root of Thought (41)
• Conflicts Between Mental Subagents: Expanding Wei Dai's Master-Slave Model (40)
• Diplomacy as a Game Theory Laboratory (39)
• Typical Mind and Politics (39)
• The Skeptic's Trilemma (37)
• The 'Spot the Fakes' Test (36)
• Blue- and Yellow-Tinted Choices (36)
• Applied Picoeconomics (36)
• Antagonizing Opioid Receptors for (Prevention of) Fun and Profit (34)
• What I Tell You Three Times is True (33)
• Where's Your Sense of Mystery? (30)
• Would Your Real Preferences Please Stand Up? (30)
• Crowley on Religious Experience (29)
• Solutions to Political Problems as Counterfactuals (28)
• Why Real Men Wear Pink (28)
• Rationalist Poetry Fans, Unite! (27)
• Why Support the Underdog? (27)
• The Zombie Preacher of Somerset (24)
• Are You a Solar Deity? (24)
• The Implicit Association Test (23)
• More Thought on Assertions (22)
• Fight Biases, or Route Around Them? (22)
• Bogus Pipeline, Bona Fide Pipeline (19)
• Help, Help, I'm Being Oppressed! (19)
• It's Not Like Anything to Be a Bat (12)
• Framing Effects in Anthropology (1)