"FOURTH WORLD is a gem. Exciting and interesting while covering the span of archaeology, time travel, government conspiracies, overcoming diversity, individualism, and friendships that defy odds, Chiavari paints us a vivid colonized Mars with such beauty it's effortless to believe." - Brenda J. Pierson, author of JOYTHIEF "Striking characters evolving in a beautifully-described Mars, coherent and entrancing world-building, a mystery that builds relentlessly, one question after the other..." - Claudie Arseneault, author of VIRAL AIRWAVES "This book fires perfectly on all cylinders." - Jaylee James, editor of VITALITY magazine "The world-building of both the Martian colony and Nadin's world, Iamos, is nothing short of spectacular. Full of mysteries, intrigue, and fantastical new discoveries, FOURTH WORLD is the kind of book that's hard to put down." - Mary Fan, author of ARTIFICIAL ABSOLUTES