They say the ink may contain unsafe levels of led. A warning 8-year-old Kylie Collins's mother never heard of.
"I would not want them to get sick from that, that would be my first concern," Michele Collins said.
Cumberland County library officials don't see a big problem.
"All our books are new we get thousands of new titles every year and we do lots of weeding out aggressively to keep our collection current," Children's Librarian Shelia Rider said.
The new law does not affect books for older kids and adults. This new regulation is part of a new set of laws that went into effect last month that bans anything over a minute amount of lead in everything from children's clothes, toys and books.
While several businesses that sell used books aren't aware of the new law, other used book dealers stopped buying old children's books a long time ago, and are making sure none are for sale.
"Which is to go through our stock and just make sure we don't have anything on our floor that is older than 1985," said Kristy Jones with Edward McKay Used Books Store.
There is some confusion behind the book ban, some government officials say the ink in older books pose little danger.
And some parents like heather Reynolds say they're not going to worry about it.
"I'm not going to get rid of my old books so I am not going to worry too much about it," Reynolds said.
School librarians in Cumberland County are also reviewing their reading material, and pulling any questionable books from the shelves, and holding them until the government tells them what to do with them.
