Tom Clancy's EndWar: The Missing is the third EndWar novel. The Ghosts are only mentioned in the novel, with the exception of General Scott Mitchell.
Publisher's summary[]
After a devastating nuclear exchange in the Middle East, America and Russia stand on opposite sides in the quest for the world’s resources.
While on a recon mission over Russia, Joint Strike Force pilot Major Stephanie Halverson tests a revolutionary new radar device—until she is shot down. In the jungles of Ecuador, relentless Marine Raider Captain Mikhail “Lex” Alexandrov pursues a wanted terrorist—and stumbles on an international conspiracy that will take him and his team into battle. On an island off Japan, a former Russian spy is hunted by her comrades, and her only way out could be to defect to the West.
Each of their fates intertwines with a deadly cabal thought to have been destroyed, but it was only wounded. And now it has returned—stronger than ever…
Based on Ubisoft’s bestselling game, Tom Clancy’s EndWar®