Back in the days just before movies had sound, before radio made it big, and even before the coming of comic books, another entertainment form reigned supreme.

It was known as "the pulps."

The pulps were a group of fiction magazines that existed from the early 1900s through the 1950s. They were stocked at newsstands by a wide array of publishers and cost between 10 and 25 cents each. They were called "the pulps" because they were printed on dirt-cheap wood pulp paper.

The covers of most had stunning and sometimes shocking images meant to spur a quick sale. Some featured a tough-as-nails detective scooping up his faint-hearted, and always beautiful, employer. Others had vivid paintings of the hero about to get bushwhacked. Still others showed readers that, once again, those darn Martians were up to no good.

Inside there was something for everyone. Dad might enjoy the story of a daring soldier. Mom might go for a romance. Sis was likely to swoon over the tale of the brave Canadian Mountie who rescues his girlfriend from a rampaging bear. And little brother? He was a sucker for stories about space aliens.

Now more than 50 years after the last true pulp was spat out of a printing press, collectors are still finding more and more to enjoy. On March 15 a few dealers at the York Book and Paper Show at the York Expo Center's Old Main Building will be selling a bevy of original magazines right alongside a host of reprinted collections from modern publishers.

To understand the appeal of the pulps you have to set yourself back in time, explains pulp historian Will Murray of Massachusetts.

"They were called family magazines because you could buy an issue and pass it around to the whole family," he said. "In the peak period of time of the pulps, roughly from the late teens to early'40s, a lot of the pulps could be considered the equivalent of a programming block of TV."

Authors: Sometimes the stories were breathless, exciting and thrilling. Most of the time the stories were as flimsy as the paper they were printed on. But among the hundreds upon hundreds of dreadful stories, some quality material emerged.

"From the mid- to late 1920s, you see the rise of a lot of new voices," Murray said.

Among them were the likes of crime writer Elmore Leonard, horror master H.P. Lovecraft, detective-story pioneer Raymond Chandler, "Maltese Falcon" scribe Daschle Hammett, Edgar Rice Burroughs who thought up the world-famous Tarzan, and Conan creator Robert E. Howard.

But the majority of pulp writers never became famous, they just wrote at a feverish rate, said John P. Gunnison, a Silver Spring, Md., pulp reprint publisher.

Genres developed: Along the way of all that writing, many of the pulp writers broke new ground by exploring new genres.

"The pulps sort of molded the popular fiction and stories for the rest of the century. Just look at Tarzan, Dr. Kildaire and detectives like Sam Spade," said Gunnison, who will be selling pulps and pulp reprints at the York show.

In fact, pulp historians say almost every modern dramatic genre was first explored in the pulps.

The hit television drama "ER" was likely birthed in the pulps.

Enjoying the new version of "Dragnet" on ABC? It's probably been done before in some 10-cent magazine from 1937.

Are you wowed by the likes of Batman and Superman? Then you might want to read the Shadow and Doc Savage.

Even the more obscure pulp characters have found new homes. The new CBS drama called "The Hack," which features a Los Angeles taxi driver who solves crimes, immediately reminded Gunnison of the basic story line of a pulp story collection he compiled in the book "At the Stroke of Midnight."

"I've only seen a few episodes, but you can practically read along," he said.

Fall of the pulp: Like most mediums, the pulp was essentially killed by a new form of entertainment. The pulps were in their heyday from the 1920s until the 1940s, Gunnison said, but it was "the booming of pop culture" through radio, the movies, television and even comic books that eventually killed off the pulps.

"They died the death of a thousand cuts," explained Murray, who's working on a history of the Wild West pulps. The depression was the first serious blow when people couldn't spare a dime for the pulp. "Then in the late 1930s, radio went coast-to-coast, then comics came along in 1939 and eroded the youth readers, and then Hollywood really took off in the 1940s. They limped along through World War II, but when TV came in '47, that pretty much killed the pulps."

With the pulp market's collapse, a secondary collectors market soon appeared.

Some collectors wanted them solely for their shocking cover art.

"Cover art where what collectors call the 'Weird Menace' appeared are really popular," Gunnison said. "They are the ones where there is some woman in peril who is threatened by a strange evil — like a sinister doctor or a hunched-over gnome — are especially collectible."

Still both Gunnison and Murray say most collectors just like a good-old fashioned story to read.

The Internet, with its globe-spanning reach, has helped raise the awareness of pulps, Murray said.

"It creates a nexus of interest that has introduced the pulps to a new generation," he said.

"The Internet creates a focal point. It's a new trigger of interest in the collectible pulp," Murray said, adding that original pulps in good condition can fetch more than $100.

Will the pulps ever come back? Murray thinks it's possible.

"It's always possible. Someone would have to find a format that works. You'd have to find a way to do a magazine that attracts a wide range of buyers. We've become less and less a reading nation, but still the answer is a qualified 'yes.'"

Most pulps measured 7-by-10 inches had 128 pages and were sold almost exclusively on newsstands.

Each issue featured several short stories and a 60,000- to -80,000-word mini-novel inside. A variety of full-page advertisements and story illustrations also were peppered throughout each issue.

Each issue sold for 10 to 25 cents and were mostly published monthly. The most prolific pulps, mostly in the romance genre, had print runs of nearly 1 million.

Unlike magazines today, pulps weren't produced on slick paper, but on a grainy cheap paper, similar to paperbacks of today. The paper was so cheap that it disintegrated over time and relatively few original copies exist today.

Today, an original pulp magazine in good condition fetches between $30 and $100. Still it's not uncommon to find well-worn issues for just $5.

Pulp-era role-playing game Pulp Adventures