'At the lowest end of what a business book could be is, yes, it's a calling card... [But] what if your book was transformational?'

Parul Bavishi - editor, former literary scout, co-founder of the London Writers' Salon and host of the Writers' Hour podcast - knows something about the realities of writing and the power of creative community.

Writing can be a lonely business, but in the LWS's regular 'Writers' Hour' Parul has seen the extraordinary power of 'body doubling' - simply watching others write can be all the encouragement and support a writer needs to get unstuck. And there are even more potent aspects of community such as accountability and critique that can take your writing to the next level.

We also talk about the genius that is the five-minute outline, the agony that is finishing and shipping a book, and how to ensure that your nonfiction book clearly sets out (and fulfils) a promise of transformation to the reader. Because if you're going to put all that time and emotional labour into writing a book, you might as well make it one that changes people's lives.