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It actually depends on the content of your book or a chapter of your book. Nevertheless, make it compelling. Like for example, there is this chapter title, "The Sweet Spot". This somehow triggers curiosity in the reader: what could that Sweet Spot be? The content, meanwhile, talks about the journey to achieving success - that along the way, there would be some obstacles and challenges. But in the end, your difficulties will be compensated with success and fulfillment - that is, the sweet spot.
Use your imagination, so to speak.
can you explain more please ?