An upcoming Michael Vick appearance at an Atlanta Barnes and Noble has been cancelled following multiple threats of violence to Vick, his family, store employees and store property.

These threats have been reported to police.

Vick was set to sign copies of his book, “Michael Vick: Finally Free” at three Barnes and Noble locations: in Atlanta, New Jersey and Exton, Pa. All have been cancelled because of safety concerns. The Atlanta appearance was scheduled for this Saturday.

“While we stand by Michael Vick’s right to free speech and the retailers’ right to free commerce, we cannot knowingly put anyone in harm’s way, and therefore we must announce the cancellation of Mr. Vick’s book-signing appearances,” said Byron Williamson, president of Worthy Publishing. “We’ve been assured these threats of violence, which have been reported to the police, are being taken very seriously by local authorities.”

There has been a recent uptick in what a source close to Vick calls “credible threats of violence” directed toward the Eagles quarterback and his family.

The bookstore’s Facebook page has been flooded with comments protesting the appearances. The same is true for Vick’s fan page. In many instances, it goes well beyond protesting. Vick and his family have been threatened on a number of occasions.

Some recent examples:

“I would go there to slit your throat knowing how you treat animals.”

“hope your kids don’t fall in a pool with a battery.”

“I would snap your neck if I met you, your [sic] a piece of trash.”

It goes on and on.

There has been plenty of hostility directed towards Vick since re-entering the public forum following a 19-month prison stint for his involvement in a dog-fighting ring. While he now faces less opposition overall, the tone has been more violent recently, according to a source close to Vick.

“This is a small number of Hate Groups who have turned to terroristic threats,” said the source.