The layover was supposed to last two hours. Instead, it stretched into four or five. Traveling alone through ­Cincinnati/Northern Kentucky ­International Airport (CVG), a woman wandered the concourse looking to pass the time. Then she spotted a sign for the Airport Library. When she arrived, she sat down, plugged in her devices, and picked up a historical biography she said she never would have chosen under normal circumstances. Before she knew it, boarding was announced. Later, she hand-wrote a note thanking Kenton County (Ky.) Public Library (KCPL) and airport staffers who made the experience possible, saying her unexpected delay passed quickly—and pleasantly—because of that quiet corner and that book. “We thought, there are so many people coming through this airport who probably forgot a book, or have been delayed, or are just kind of stuck waiting for a layover,” says KCPL Executive Director Dave Schroeder.…