You can order Keith's book,
Temple Mount, at this online retailer:
Alex Kalman has sold his Silicon Valley start-up and is sitting at home in an armchair bored and purposeless. The phone rings. A grandfather he never knew is dying. He rushes to the old man's bedside and finds himself promising to find the Ark of the Covenant, missing for over 2,500 years. In Israel Alex picks up a partner in his quest—archeologist Rivka Golan. Within days they are targeted by a sniper, chased through the streets of Jersualem by a bulldozer, interrogated by Israeli intelligence, and trapped in a tunnel under the world's most sacred site—the Temple Mount.