Six miles below the surface of the ocean, Mia has to solve a locked-room murder mystery before the crime scene is completely flooded. As the crew tries to save the Dept. H base from destruction, some of them start to take matters into their own hands. But the bottom of the ocean is full of unknown dangers, and with time running out, rescue is almost impossible. From New York Times bestselling author Matt Kindt (MIND MGMT, PastAways, Superspy)!Written...

Contains the exciting series conclusion! The remaining survivors of Dept. H abandon the deep-sea base and prepare for their long-awaited ascent. But life above the waterline remains uncertain for the team, and the pressure to solve Hari's murder continues to strengthen its grip on Mia. Secrets and memories begin to surface, but before Mia can unpack the mystery, she must decide the fate of those still stuck six miles below sea level. As the water...

From New York Times bestselling Mind MGMT creator Matt Kindt comes an exciting undersea sci-fi mystery. With the deep-sea base on the brink of destruction, Mia is getting closer and closer to discovering the culprit behind the murder of her father. However, as the crew struggles to survive, revelations of the Dept. H project comes to light that will alter the lives of the crew, if they survive. Life on the surface hangs in the balance as Mia races...