You don’t write a book when God called you to publish a library! You don’t plant a tree when God send you to cultivate a forest! You don’t evangelize to a crowd when God called you for a multitude! No matter the circumstances, find yourself doing something relevant and do it till all is well done!
We live in the information age and the sheer volume of it being available everywhere, creates a need for information that has value. Yes, we can look anything up on Google but who has the time? Can we trust that the information comes from a trustworthy source? Your experience has given you a deep knowing of your subject matter. You have insights and ideas that others may not figure out on their own. You are holding a roadmap that has great value to someone. What has been stopping you from sharing your knowledge? Perhaps you have been afraid to put yourself out there because of a fear of rejection? Let me get straight to the point. Get over it right now! Ponder the following quote for a moment and then move on with the decision to write rather than not to write, because not to write is not “to be”. You deny yourself and your audience. You have had an incredible journey to get to where you are and have amassed experience and knowledge. Now combine that with your unique voice and be heard. You are already an expert. Accept it.
An increasing number of people are taking advantage of having a leg up on their competition by branding themselves as "the expert" in their particular niche. Call it a business card, a resume, a billboard, or whatever you choose, but the long and short of it is that books are no longer just books. They are branding devices and credibility builders, not to mention door openers. Books are the reason that authors command large speaking and consulting fees.