The Sept. 7-8 event, advertised as the "Flatwoods Monster 55th Anniversary and A Flying Saucer Extravaganza," is headlined by author-illustrator Frank Feschino, creator of "The Braxton County Monster: The Cover-Up of The Flatwoods Monster," and "Shoot Them Down," a book that claims U.S. aircraft engaged alien ships in combat in 1952, the Beckley (W.Va.) Register-Herald reported Wednesday.

The event also features appearances by UFO investigator and nuclear physicist Staton Friedman, who has long claimed a cover up in the infamous incident in Roswell, N.M., in 1947, which many UFO enthusiasts claim was an alien spaceship crash.

"I believe if you come to this show you'll see some hard evidence," said promoter Larry Bailey. "You're going to see some hard evidence. That's a promise. That's not just promotional talk."

Bailey said a large turnout is expected for the event.

"We're getting a lot of response from out of state," he said. "The Midwest. Up in New England. It's really being pushed."