I put these comments in mostly so I can remember whether I've read the book or not.
U.S. Army Ranger Tucker Wayne and his four-footed partner, a small Belgian shepherd named Kane. After a short stint protecting a Russian billionaire, Tucker signs on with Sigma Force, a unit working for the ultra-secret Defense Advanced Research Projects Agency. His job is to smuggle pharmacological tycoon Abram Bukolov out of Russia. Bukolov’s reasons for fleeing his country are murky, but it eventually becomes clear that he has the key to a virulent life form that has the potential to destroy all the plant life on Earth. Meanwhile, Gen. Artur Khazin of Russian military intelligence hires freelance mercenary Felice Nilsson to prevent Bukolov from escaping. The action careens across Russia and into South Africa, where Tucker and Kane must go underground to find the deadly life form.