Don't fall for inflated, self-serving claims about the benefits of writing a book. Being an author can boost your career, but only if....
In their book Publish & Flourish, A Consultant’s Guide (1992), authors Garry Schaeffer and Tony Alessandra make this bold claim:
Many [consultants, professional speakers, and trainers] get to a point [in their careers] in which they are established, but not to the extent that they would like. The question becomes, "How do I make the leap to the position of having nearly all the business I want?" The answer is simple: Get published.
Well, it’s not that simple. First of all, writing books won’t help you if what you really need is to improve the quality of your service or develop better client relations, for example. If you have reached those primary goals, then maybe writing a book can help increase your visibility in the marketplace, give you extra credibility, and position you as an eminent expert and foremost authority in your practice