Sisters and Lies by Bernice Barrington

Second Hand 

'A hugely accomplished thriller, which derives its power from excellent characterisation - they're all well-rounded, recognisable, believable real people - and a meticulously twisty plot. I honestly had NO idea what the secret at the heart of the book was, until right at the very end. In a market-place crowded with grip-lit, Sisters and Lies is head and shoulders above the rest.' Marian Keyes

One hot August night, Rachel Darcy gets the call everyone fears. It's the police. Her younger sister Evie's had a car crash, she's in a coma. Can Rachel fly to London right away?

With Evie injured and comatose, Rachel is left to pick up the pieces of her sister's life. But it's hard fitting them together, especially when she really doesn't like what she sees.