Last month, the Chicago Public Library system became the largest in the country to eliminate late fees thanks to Mayor Lori E. Lightfoot.

While the move, which was implemented October 1, was intended to "remove unfair barriers to basic library access, especially for youth and low-income patrons," it had another positive outcome. Since the removal of overdue fees, along with the elimination of any outstanding charges on people's accounts, libraries across the city saw a surge in the return of overdue books over the last several weeks.

"The amount of books returned has increased by 240 percent…We're very, very happy to have that. … Those books have a value and cost money to buy. We want those assets back. We also want the patron to come back," Library Commissioner Andrea Telli said at a City Council budget hearing, the Chicago-Sun Times reports.

According to a press release from Lightfoot, late fees rarely have the impact they're intended to. "Research from other fine-free systems has indicated that fines do not increase return rates, and further that the cost of collecting and maintaining overdue fees often outweighs the revenue generated by them."