A textbook theft operation in Gwinnett County has taken a violent turn, with two alleged ring members accused of robbing at gunpoint a bookstore that refused to buy some of the stolen texts, authorities say.

"We obviously cut these guys off. We weren't giving them any more," Brad Faulkner, co-owner of Dorks Books in Lawrenceville, told Channel 2 Action News. "It makes sense these guys may rob us."

The alleged bandits gave themselves away when one of them called the bookstore a week after the robbery to get the hours of a sister store in Hall County, Channel 2 reports. The store owner recognized the caller as one of the suspects when his name showed up on caller I.D.

Last Friday, police were waiting when David Moseley, 26, of Lawrenceville, walked into the Dorks Books in Oakwood. He was arrested. Police now are seeking Moseley’s alleged accomplice, Chaz Ivery, also 26 and of Lawrenceville.

Lawrenceville police are charging Moseley and Ivery with armed robbery, according to arrest warrants for the men.

Moseley allegedly tried to sell stolen textbooks at Dorks on July 8, and after the store turned him away, “within a minute, another guy came in with a gun screaming at the top of his lungs,” Faulkner said. The second man is believed to be Ivery.

Separate warrants by the campus police at Gwinnett Technical College in Lawrenceville charge the pair and a third man, Frankie Wright, 25, of Atlanta, with interference with government property.

More than $20,000 in textbooks are believed to have been stolen from the school library for re-sale in used book stores.

The three men are the latest to be implicated in a textbook theft ring that allegedly stole from the libraries at Gwinnett Tech and Georgia Gwinnett College. In May, two other men and a woman were arrested and charged in connection with book thefts from Georgia Gwinnett.