Sorry, this is not one of those stories that's going to tell you steps one, two, and three of how to write a book in three months. It's a bit more existential than that.You see, Stephen King believes you can write a book in three months.

I believe the first draft of a book—even a long one—should take no more than three months, the length of a season.

And if you write like Stephen King, you undoubtedly can accomplish this.So we're in luck. Stephen King told us how he writes.

On Writing by Stephen King

The following are excerpts taken from Stephen King's On Writing. Bold and italics are mine.

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We are writers, and we never ask one another where we get our ideas; we know we don’t know.--I don’t believe writers can be made, either by circumstances or by self-will (although I did believe those things once). The equipment comes with the original package. Yet it is by no means unusual equipment; I believe large numbers of people have at least some talent as writers and storytellers, and that those talents can be strengthened and sharpened.--

“When you write a story, you’re telling yourself the story,” he said. “When you rewrite, your main job is taking out all the things that are not the story.”

--Write with the door closed, rewrite with the door open. Your stuff starts out being just for you, in other words, but then it goes out. Once you know what the story is and get it right—as right as you can, anyway—it belongs to anyone who wants to read it. Or criticize it. If you’re very lucky (this is my idea, not John Gould’s, but I believe he would have subscribed to the notion), more will want to do the former than the latter.--If she had suggested that the time I spent writing stories on the front porch of our rented house on Pond Street or in the laundry room of our rented trailer on Klatt Road in Hermon was wasted time, I think a lot of the heart would have gone out of me. Tabby never voiced a single doubt, however. Her support was a constant, one of the few good things I could take as a given. And whenever I see a first novel dedicated to a wife (or a husband), I smile and think, There’s someone who knows. Writing is a lonely job. Having someone who believes in you makes a lot of difference. They don’t have to make speeches. Just believing is usually enough.--When I got back home she was in the kitchen, unpacking the baby bags and singing along with the radio. I gave her the hair-dryer. She looked at it as if she’d never seen one before. “What’s this for?” she asked. I took her by the shoulders. I told her about the paperback sale. She didn’t appear to understand. I told her again. Tabby looked over my shoulder at our shitty little four-room apartment, just as I had, and began to cry.--We could hear the pause after each rasping breath she drew growing longer and longer. Finally there were no more breaths and it was all pause.--Put your desk in the corner, and every time you sit down there to write, remind yourself why it isn’t in the middle of the room. Life isn’t a support-system for art. It’s the other way around.--Put your vocabulary on the top shelf of your toolbox, and don’t make any conscious effort to improve it.--One of the really bad things you can do to your writing is to dress up the vocabulary, looking for long words because you’re maybe a little bit ashamed of your short ones. This is like dressing up a household pet in evening clothes. The pet is embarrassed and the person who committed this act of premeditated cuteness should be even more embarrassed. Make the basic rule of vocabulary is use the first word that comes to your mind, if it is appropriate and colorful.--American grammar doesn’t have the sturdiness of British grammar (a British advertising man with a proper education can make magazine copy for ribbed condoms sound like the Magna goddam Carta), but it has its own scruffy charm.--The simplicity of noun-verb construction is useful—at the very least it can provide a safety net for your writing.--Without Constant Reader, you are just a voice quacking in the void.--And remember: The writer threw the rope, not The rope was thrown by the writer. Please oh please.--

“You got a nice butt, lady,” he said cheekily.

--Paragraphs are almost as important for how they look as for what they say; they are maps of intent.--Writing is refined thinking. If your master’s thesis is no more organized than a high school essay titled “Why Shania Twain Turns Me On,” you’re in big trouble.--We are talking about tools and carpentry, about words and style . . . . but as we move along, you’d do well to remember that we are also talking about magic.I am approaching the heart of this book with two theses, both simple. The first is that good writing consists of mastering the fundamentals (vocabulary, grammar, the elements of style) and then filling the third level of your toolbox with the right instruments. The second is that while it is impossible to make a competent writer out of a bad writer, and while it is equally impossible to make a great writer out of a good one, it is possible, with lots of hard work, dedication, and timely help, to make a good writer out of a merely competent one.--If you want to be a writer, you must do two things above all others: read a lot and write a lot. There’s no way around these two things that I’m aware of, no shortcut.--What this suggested to me was that when it came to the sax and my son, there was never going to be any real play-time; it was all going to be rehearsal. That’s no good. If there’s no joy in it, it’s just no good. It’s best to go on to some other area, where the deposits of talent may be richer and the fun quotient higher.--I believe the first draft of a book—even a long one—should take no more than three months, the length of a season.--I like to get ten pages a day, which amounts to 2,000 words. That’s 180,000 words over a three-month span, a goodish length for a book.--Like your bedroom, your writing room should be private, a place where you go to dream.--John Grisham, of course, knows lawyers. What you know makes you unique in some other way. Be brave. Map the enemy’s positions, come back, tell us all you know. And remember that plumbers in space is not such a bad setup for a story.--Plot is, I think, the good writer’s last resort and the dullard’s first choice.--Wallace invented—and patented—a device called the Edgar Wallace Plot Wheel. When you got stuck for the next Plot Development or needed an Amazing Turn of Events in a hurry, you simply spun the Plot Wheel and read what came up in the window: a fortuitous arrival, perhaps, or Heroine declares her love. These gadgets apparently sold like hotcakes.--Good description is a learned skill, one of the prime reasons why you cannot succeed unless you read a lot and write a lot. It’s not just a question of how-to, you see; it’s also a question of how much to. Reading will help you answer how much, and only reams of writing will help you with the how.--the faces, the builds, and the clothing as well. If I tell you that Carrie White is a high school outcast with a bad complexion and a fashion-victim wardrobe, I think you can do the rest, can’t you? I don’t need to give you a pimple-by-pimple, skirt-by-skirt rundown. We all remember one or more high school losers, after all; if I describe mine, it freezes out yours, and I lose a little bit of the bond of understanding I want to forge between us.--Description begins in the writer’s imagination, but should finish in the reader’s.--There are lots of bells and whistles, too—onomatopoeia, incremental repetition, stream of consciousness, interior dialogue, changes of verbal tense (it has become quite fashionable to tell stories, especially shorter ones, in the present tense), the sticky question of back story (how do you get it in and how much of it belongs), theme, pacing (we’ll touch on these last two).--Your job during or just after the first draft is to decide what something or somethings yours is about. Your job in the second draft—one of them, anyway—is to make that something even more clear.--This first draft—the All-Story Draft—should be written with no help (or interference) from anyone else. There may come a point when you want to show what you’re doing to a close friend (very often the close friend you think of first is the one who shares your bed), either because you’re proud of what you’re doing or because you’re doubtful about it. My best advice is to resist this impulse. Keep the pressure on; don’t lower it by exposing what you’ve written to the doubt, the praise, or even the well-meaning questions of someone from the Outside World. Let your hope of success (and your fear of failure) carry you on, difficult as that can be.--How long you let your book rest—sort of like bread dough between kneadings—is entirely up to you, but I think it should be a minimum of six weeks.--All novels are really letters aimed at one person.--Do all opinions weigh the same? Not for me. In the end I listen most closely to Tabby, because she’s the one I write for, the one I want to wow. If you’re writing primarily for one person besides yourself, I’d advise you to pay very close attention to that person’s opinion (I know one fellow who says he writes mostly for someone who’s been dead fifteen years, but the majority of us aren’t in that position). And if what you hear makes sense, then make the changes. You can’t let the whole world into your story, but you can let in the ones that matter the most. And you should.--Jotted below the machine-generated signature of the editor was this mot: “Not bad, but PUFFY. You need to revise for length. Formula: 2nd Draft = 1st Draft – 10%. Good luck.”--Writing isn’t about making money, getting famous, getting dates, getting laid, or making friends. In the end, it’s about enriching the lives of those who will read your work, and enriching your own life, as well. It’s about getting up, getting well, and getting over.--Writing is magic, as much the water of life as any other creative art. The water is free. So drink. Drink and be filled up.--You can buy the book here. :)