This tense, thrilling, science fiction, whodunit is a first for me and to say I thoroughly enjoyed it is an understatement. The description of living, existing and trying to stay alive on such a barren and soulless planet as Mars really came through in the writing. You're relying on everyone for survival but to know there's a murderer amongst you must be as scary as hell. Much to my delight there is a sequel -and it's already on order!
