NCIS Los Angeles: ExtremisMass Market Paperbound, 30 August 2016

In a division of NCIS that is charged with apprehending dangerous and elusive criminals that pose a threat to the nation's security, this team of highly trained agents put their lives on the line in the field to bring down their targets.

An 85-year-old retired rear admiral and two-term California senator is found murdered in his home--the place ransacked, and his computer's hard drive stolen. Special Agents "G" Callen and Sam Hanna are called in to investigate. They, along with the rest of the team, soon uncover a connection to a top-secret U.S. Navy project dating back to World War Two. Putting the pieces together they are quickly caught up in a race against time to prevent a very real, very deadly threat in the here-and-now.