Libraries in Lincoln will allow residents with overdue books to return them free of charge through November.
The amnesty on books means any book or audio book overdue will not incur the usual late fine until the beginning of December.
Head of Libraries and Heritage Jonathan Platt said: “Lincolnshire’s libraries have more than a million books to choose from.
“Only a small percentage of stock is currently overdue, but if it happens to be the particular title you’re looking for it can be frustrating.
“Often people will inadvertently forget to return a book, then worry about having to pay a fine. This amnesty is a chance to bring them back free of charge.
“It will also mean that these titles again become available for others, so everybody benefits.”
To find where your local library is, call 01522 782010 or visit www.lincolnshire.gov.uk/libraries.