DAY FOUR is smart, incisive an d raises real questions about the world in which we live.... But the real praise is that I had to leave the light on in the bedroom after finishing it.
Scotland on Sunday
Lotz's expertise [is] at orchestrating the mounting tension as the story builds to a wonderfully ambiguous, though satisfying and unusual, denouement.
Guardian
You'll turn the pages curiously, hungry for clues, until the ending...kicks you in the stomach. Take it to the beach - but maybe not on a cruise.
Entertainment Weekly
A satirical scream... sign me up for the next cruise!
New York Times Review of Books
Chilling, creepy horror set against an all too believable backdrop of human selfishness when the trappings of civilisation are removed. <b>Highly recommended.</b>
Sci Fi Bulletin