Part of Sigma Force, book 4
First published 2007
A mysterious disease emerges from the Indian Ocean depths, killing with unstoppable efficiency. Dr. Lisa Cummings and Monk Kokkalis from SIGMA Force board a cruise ship converted into a floating hospital to investigate the outbreak. Their mission turns deadly when terrorists seize the vessel and transform it into a biological weapons laboratory. Meanwhile, Commander Gray Pierce confronts an assassin who possesses vital information about a potential cure. Pierce must work with the woman who tried to kill him as they follow clues left by Marco Polo across continents. The plague spreads globally while a dangerous enemy pursues them at every turn. Pierce and his reluctant partner uncover secrets buried in ancient history and human genetics. Time runs short as the pandemic threatens all humanity. Pierce discovers he cannot trust anyone around him, as betrayal lurks within his own ranks.
Genres: medical, adventure, mystery, thriller, action
Vibes: fast-paced, suspenseful, thought-provoking
Tropes: enemies-to-lovers, found-family, reluctant-partners
Setting: India, Indian Ocean
Period: Contemporary
450 pages · Hardcover · William Morrow
Content warnings: violence