OKLAHOMA CITY - Propaganda from a white supremacist group was placed inside books at the Oklahoma City downtown library.

This week, posters promoting the hate group were found in Midtown and taken down.

A downtown employee then checked the group’s Twitter page and noticed it had bragged about putting messages inside some books at the OKC public library.

So, Michael Kimball went down to the library on his lunch break Tuesday. He found the books and removed the messages.

Kimball recorded the whole thing as he took the notes found in three books.

The video was posted online.

“Your role as a person in society is to stand up for what you believe in at all times,” said Kimball.

“Our staff is currently inspecting our collection to see if there are any other unauthorized items placed in the books as well," said Metropolitan Library System Director of Marketing Kim Terry in statement to News 9.