Kill Your Husbands'A twisted and devious ride.' Hayley Scrivenor 'Kept me guessing right till the end.' Rachael Johns 'There are two brain teasing mysteries at play here: One, an expertly crafted locked room puzzle to solve. Two . . . how is Jack Heath just so damn good?' Benjamin Stevenson Three couples, friends since high school, rent a luxurious house in the mountains for an unplugged weekend of drinking and bushwalking. No internet, no phones, no stress. On the