As with anything you want to learn and then do well, you need expert advice and guidance. Hiring a book writing coach when you want to write a book is like hiring a physical trainer when you want to get fit. Yes, you can get fit on your own by eating well and going to the gym, but do you really know the right exercises for your body type and goals? Do you know the right foods to eat for your metabolism and training schedule? And will you keep turning up to the gym when it’s cold and wet and all you want to do is eat chocolate and drink wine on the couch?
Likewise, of course you can write a book without a writing coach…but will you consistently write for a few hours each week until your manuscript is complete? Will you be able to push through the writer’s blocks on your own? Are you able to make decisions about structure and tone and characterisation without some help? Do you know how to publish and market your book once it’s complete?