On the dying Earth, humanity's survival is riding on a single test.Daoren and Heqet were born into a terrifying world they didn't create.It's a world where sterile deserts smother every continent and acidic waters foul every ocean.It's a world where mass extinctions have killed off every species except for one.It's a world where half the human population never sees adulthood.Like every 19-year-old in their isolated society, Daoren and Heqet must soon take the Survival Aptitude Test.Only the smartest pass the S.A.T. and earn the right to live.The rest are harvested for food...--------------------------------------What Readers are Saying:"Best I've read since Brandon Sanderson."Amazing action-filled science fiction . . ."I see a movie in the future."I'm a big fan of alternate-timeline and dystopian-future stories, and this is one of the best I've read in a long while!"Fans of classic dystopian tales like Soylent Green and Logan's Run will love this modern twist on humanity's last gasp. Scroll up and test your nerves today!--------------------------------------Survival Aptitude Test: Sound is the first book in the complete six-book EXTINCTION ODYSSEY series:Book 1: Survival Aptitude Test: SoundBook 2: Survival Aptitude Test: FuryBook 3: Survival Aptitude Test: RiseBook 4: Survival Aptitude Test: FallBook 5: Survival Aptitude Test: LifeBook 6: Survival Aptitude Test: Death