[1][2][3] This novel is mostly set in Nepal, but parts of it take place in Indonesia, India, Tibet, southern China, Albania, Bulgaria and at the Fargo home and research center on the California coast.

The Fargos meet up with him in a library in Sofia, Bulgaria, and he provides them with a clue to aid them when they become completely confused when hunting for information on a 15th-century Eastern Orthodox priest.

A professional review by Publishers Weekly in April 2011 (as the book was being readied for release) said, "Fresh prose, a smart and amusing husband-and-wife team, interesting history and science, and a wildly imaginative plot all add up to a good time for Cussler's many fans as well as series newcomers.

"[4] Pease Exchange in June 2011 had a professional review by Sarah Baker that was also positive, "If you enjoy a fast paced adventure, that combines history with the modern day, then read The Kingdom.

However, average reader ratings in the Amazon.com, the Barnes & Noble and the Goodreads websites all gave The Kingdom almost four of five stars.