A book borrowed from the San Antonio Public Library in July 1943 was returned in June 2025, almost eighty-two years later. The book, Your Child, His Family, and Friends by Frances Bruce Strain, was found in Oregon inside a box of old belongings. It had been taken by Maria del Socorro Aldrete Flores when she moved to Mexico City for work at the United States Embassy. A letter explained the story behind the return. At that time, the fine for overdue books was three cents per day, which would equal almost sixteen thousand dollars today. However, the San Antonio Public Library removed overdue fines in 2021, allowing the return without financial penalty.

The book, which gave advice on guiding children in personal relationships, is still in good condition after more than eight decades. It is now displayed in the Central Library until August before being donated for fundraising by the Friends of San Antonio Public Library. Officials noted that this return was unusual but not the longest on record. Guinness World Records shows that the most overdue library book was returned in 1956 to Sidney Sussex College, University of Cambridge, after being borrowed in 1668, a gap of 288 years. The case shows the cultural significance of books, the endurance of libraries, the serendipity of discoveries, the legitimacy of preserving resources, and the continuity of knowledge across generations.