Locksmith's War The Locksmith Trilogy Book Three by Paul Briggs - Goddess Fish Promotions. GENRE: YA Sci-fi (Young Adult, Science Fiction). For Lachlan Smith, learning the secret of the apocalypse was the easy part. Ever since Locksmith found the portal to the future, he has been wondering who or what was responsible for the empty, uninhabited world he found. Now he knows—and now he has to fight them. He thought he had fifteen years in which to prevent the extinction of the human species. Now, he has only hours.