[header] How to know if you should write a book [title] Consider whether you possess uncommon knowledge about a subject or area of expertise. [step] Here is what former marketing executive and current u. s. congresswoman marsha blackburn had to say about the subject: " everyone has a transferable commodity-knowledge. Sharing your unique expertise and making introductions for someone creates a lasting legacy. 
" [title] Ask yourself if your experience in a subject area something that you are willing to share. [step] If the experience is painful, and telling about it might dredge up the uncomfortable past, then you will need to factor this into the decision.