I've changed the book I'll read for the 13 square. I came across "TH1RT3EN" by Steve Cavanagh in Waterstones and thought it looked fun.
I haven't read Cavanagh before but I couldn't resist the tagline: The serial killer isn't on trial. He's on the jury.
It's the fourth in a series about the same lawyer, Eddie Flynn, but I think it will read as a standalone.
Here's the publisher's summary:
"Hollywood actor Robert Soloman stands accused of the brutal stabbings of his wife and her lover, but he is desperately pleading that he had nothing to do with it. This is the trial of the century, and the defence want Eddie Flynn on their team.
The biggest case Eddie has ever tried before, he decides to take it on despite the overwhelming evidence that Robert is guilty. As the trial starts, Eddie becomes sure of Robert's innocence, but there's something else he is even more sure of - that there is something sinister going on in the jury box.
Because of this, he is forced to ask: what if the killer isn't on the stand? What if he's on the jury?"