Samantha Womack lurches valiantly through this scarcely credible crime drama It may help if you love the book. It was a runaway bestseller, so fans must be legion, but a suspenseful story which depends on memories being obscured by prodigious boozing, and featuring a trio of women best described as "flaky", all defining themselves too much by their relationships with unreliable men, is not to everyone's taste. For ne…