Kidwell-e Festival was expecting 25,000 people at Ffos Las racecourse in Carmarthenshire last weekend but fewer than 100 showed up.
Organisers said the start of the Olympics and the location could have deterred visitors.
But they pledged the festival would go-ahead next year.
The event started last Saturday, but was called off at 13:00 BST on Sunday.
Kidwell-e Festival, aimed at celebrating the e-book, was designed, in part, to provide a platform for authors interested in self-publishing.
Self-publishing is where authors tend to pay for printing and distribution costs upfront and, unlike traditional publishers, editors do not decide whether or not to publish a book.
The success of the novel Fifty Shades of Grey by E L James, is seen as a boost to the self-publishing business.
He said: "Without a shadow of a doubt this is the way forward. It's (self publishing) democratising for readers. "The publishing establishment have been the gatekeepers for many, many years. They decide what people read and when. "The market and the readers are starting to decide now, which is the way it should be." 'Not knocked out'
Mr Ruck, from Kidwelly, claimed he was regarded as something of a maverick, but he said he was looking to the future. "I invested my own money in this festival. In my own humble way I was put something into the Welsh economy," he said.
Mr Ruck said it was too early to say why people failed to attend, but said the economic climate, the Olympics, the pricing, the entry fee was £15 for one day and £25 for the weekend, and the remote location probably all played a part.
"All these things need to be looked at," he added.
"We are back next year. We have had a punch in the face, but we're not knocked out."
Mr Ruck, author of the Ragged Cliffs Trilogy, said he set up the festival to provide young authors with a chance, and to promote literacy through a children's event running alongside Kidwell-e.
Self-publishing Swansea author Ann Marie Thomas, who was one of about 30 authors due to speak at the festival, said it clashed with the Caerphilly Cheese Festival and the Olympics.
"Ffos Las is only signposted when you're nearby and there were no signs saying: 'Kidwell-e Festival this way'," she said.
"Once inside the festival there was no signage and there was quite a dash between the venues. There was no choice of food either, just a burger van. If 25,000 had turned up there would have been quite a queue for food."