Fountaindale Public Library officials said they have been having trouble for weeks with thieves entering the library and targeting its music and DVD collection.
In one case, as many as 40 CDs were taken in one day.
Allegedly, the thieves come in and remove the discs from the cases and take off with the items.
Peggy Danhoff, president of the library's board of trustees, said the only way to stop the issue is to make the multimedia collection off limits to browsing library goers, and put the CDs and DVDs in a locked case.
The library has long put electronic tags on the cases of CDs and DVDs, Danhoff said. But thieves simply take the disc out and walk out unnoticed.
Now, Danhoff said, the library is looking into putting those same tags on the discs themselves to deter library-goers from taking them.
Library officials said rap and R&B albums have been the most targeted genre for the theft.
Editor's Note: In the original version of this article, Bolingbrook Patch misquoted Theresa Hildebrand, Fountaindale's manager of circulation services. We regret this error.