Death's door

"An idyllic island holds a dark secret . . . - "On a hot August day in 1994, 76 holidaymakers travel to an island off the North Norfolk coast.

Only 75 return alive a young man is murdered, the case left unsolved.

Twenty years later, using state-of-the-art forensics, the DNA results of a bloodsoaked towel prompts DI Peter Shaw to summon all 75 original suspects to a mass screening. but one of them, the beautiful Marianne Osbourne, is found dead in her bed.

Is there a link to the 1994 murder? DI Shaw and DS Valentine become immersed in the dark secrets of an isolated community."