This book is useful for content writers and general people as well. This will not make you a novelist but gives useful tips about writing on SM and web. This gives us confidence that anyone can write. Not only write but write well.
This is explained beautifully in the book:-
"In our world, many hold a notion that the ability to write or write well, is a gift bestowed on a chosen few. Writing well is considered a kind of art, linked murkily to muse and mysticism. That leaves us thinking there are two kinds of people: the writing haves—and the hapless, for whom writing well is a hopeless struggle, like trying to carve marble with a butter knife. But I don't believe that, and neither should you. The truth is this: writing well is part habit, part knowledge of some fundamental rules, and part giving a damn. We are all capable of producing good writing. Or, at least, better writing. As David Carr of the New York Times says, “Writing is less about beckoning the muse than hanging in until the typing becomes writing.”
What is content?
Content isn't limited to the text on our Web pages or product pages or blogs or e-mail newsletters. It's broader than the things we think of as marketing. Content is essentially everything your customer or prospect touches or interacts with—including your own online properties and Web pages and the experiences they offer, but also everything on any social channel (like Instagram, Twitter, Facebook, LinkedIn, YouTube, and so on)."
Book is divided into 6 parts dealing with writing rules, grammar and usage, story rules etc.
It gives sane advice like how to write naturally. First, forget about high school writing style and not using jargon. Put most important things first and so on.
This is a must read book for everyone who is interested in writing well no matter what is the purpose.