Collaboration is not a soft skill. It's a survival skill. And yet most people treat it like something everyone should simply know how to do. The result is predictable: misalignment, bottlenecks, politics, conflict, and brilliant people who cannot seem to work together when the stakes are high.This is what Anca Castillo and Cary Lopez, PhD call the collaboration illusion-the false belief that collaboration happens naturally when well-intentioned people are placed in a room and told to "work together." In reality, collaboration is not instinctive. It is not something people magically know how to do. It is something to be learned, practiced, and intentionally designed.The Collaboration Illusion pulls back the curtain on why collaboration breaks down and how to build environments where people think better together, trust faster, and solve problems without chaos, confusion, or ego leading the room.At the heart of the book is Tim, a fictional yet deeply familiar character whose journey mirrors the challenges leaders face every day: communication gaps, unclear decisions, clashing personalities, performative alignment, and moments of conflict that reveal what teams are truly made of. Tim becomes the narrative throughline that shows readers what collaboration looks like in action-its patterns, pitfalls, and possibilities. His unfolding story is paired with real-world examples drawn from years of consulting across universities, boardrooms, nonprofits, and multi-stakeholder coalitions.Readers will learn: - Why collaboration breaks down and how the collaboration illusion silently sabotages even the most capable teams - How to design collaboration using six core principles that create clarity, trust, accountability, and forward momentum - How to navigate conflict and complexity with tools from psychology, improv, and organizational design, turning difficult moments into shared insight and real progressWhether you are leading a team, a board, a classroom, or a complex partnership, The Collaboration Illusion offers the frameworks, language, and practices needed to move beyond what we assume collaboration is and into the real thing.Stop relying on the illusion. Start practicing real collaboration.