Secret Agent Jack Stalwart : Book 5: the Secret of the Sacred Temple: Cambodia :

When an archaeologist who guards the priceless 1,000-year-old treasures of the temple of Angor Wat goes missing, her daughter Kate calls on Jack to help bring her home. No sweat for a top secret agent. Except this time it's personal. The archaeologist also has information leading to the whereabouts of Jack's missing brother. Now Jack must stop a power-hungry madman before the treasure, and the archaeologist, disappear forever.