John Locke, 60, who publishes and promotes his own work, enjoys sales figures close to such literary luminaries as Stieg Larsson, James Patterson and Michael Connelly.
But unlike these heavyweights of the writing world, he has achieved it without the help of an agent or publicist – and with virtually no marketing budget.
Instead the DIY novelist has relied on word of mouth and a growing army of fans of his crime and western novellas that he has built up online thanks to a website and twitter account.
His remarkable achievement is being hailed as a milestone of the internet age and the beginning of a revolution in the way that books are sold.
Locke, from Louisville, Kentucky, USA, whose only other artistic endeavour was as a singer with a rock band in his youth, admits that the writing it not even his day job.
He has already made a fortune from the business world and private investments.
But like with his other money making schemes he puts the secret of his success down to spotting a gap in the market with the arrival of the ebook, the Kindle, and online publishing.
He saw that many successful authors were charging almost $10 (£6) for a book and decided that he would undercut them – selling his own efforts for 99 cents (60 pence).
"I’ve been in commission sales all my life, and when I learned Kindle and the other e-book platforms offered a royalty of 35 per cent on books priced at 99 cents, I couldn’t believe it," he said.
"To most people, 35 cents doesn’t sound like much. To me, it seemed like a license to print money.
"With the most famous authors in the world charging $9.95 for e-books, I saw an opportunity to compete, and so I put them in the position of having to prove their books were 10 times better than mine.
"Figuring that was a battle I could win, I decided right then and there to become the bestselling author in the world, a buck at a time."