الإسلام والمسيحية
A second book, "The Tenth Parallel: Dispatches from the Fault Line Between Christianity and Islam", is a travelogue about the regions of the world along the line of latitude where Christianity and Islam clash. In 2011 Griswold was awarded the J. Anthony Lukas Book Prize for "The Tenth Parallel." She was also a 2012 Guggenheim Fellow.