Is your book idea worth 6 months?

From the video description

I evaluate book ideas using four questions. First: Urgency. Does the reader want this answer now—or only find it mildly interesting? Second: Ownership. Can this idea become associated with your name? Third: Proof. Do you have experiences, results or evidence that make the book believable? And fourth: Expansion. Can this idea grow into talks, tools, courses, consulting, community or a larger movement? Now here is what surprises most authors. A popular topic can still be a low-value book idea. Because if a thousand people are saying the same thing… the topic has demand, but you have no ownership.