James Rollins · 2013 · thriller

James Rollins's 2013 Sigma Force thriller. A comet threatens Earth and a skull that may foretell the catastrophe surfaces, sending the team from Washington to Rome, the dry bed of the Aral Sea, Macau and the mountains of Mongolia - racing a threat back to the lost tomb of Genghis Khan and a relic that may see the future itself.

1. 1
   Washington DC

   A research satellite crashes carrying a dark-energy secret and a last image of the American seaboard in ruins; Sigma has four days to prevent it.

2. 2
   Rome

   At the Vatican a parcel arrives bearing the skull of Genghis Khan and a book bound in human skin, a warning out of the deep past.

3. 3
   Aral Sea

   On the poisoned flats of the dying Aral Sea a vanished scholar has hidden the relics that map the way to the Great Khan's tomb.

4. 4
   Macau

   In the casinos and triad wars of Macau, Seichan hunts for her lost mother while the clock runs down.

5. 5
   Pyongyang

   A desperate detour carries the team deep into North Korea before the final leg of the chase.

6. 6
   Mongolia

   In the Khentii mountains, the undiscovered tomb of Genghis Khan holds the key to turning aside the comet's deadly gift.