Book ~ "The Kind Worth Killing" (2015) Peter Swanson

From Goodreads ~ On a night flight from London to Boston, Ted Severson meets the stunning and mysterious Lily Kintner. Sharing one too many martinis, the strangers begin to play a game of truth, revealing very intimate details about themselves. Ted talks about his marriage that’s going stale and his wife Miranda, who he’s sure is cheating on him. Ted and his wife were a mismatch from the start - he the rich businessman, she the artistic free spirit - a contrast that once inflamed their passion, but has now become a cliché.

But their game turns a little darker when Ted jokes that he could kill Miranda for what she’s done. Lily, without missing a beat, says calmly, “I’d like to help.” After all, some people are the kind worth killing, like a lying, stinking, cheating spouse.

Back in Boston, Ted and Lily’s twisted bond grows stronger as they begin to plot Miranda's demise. But there are a few things about Lily’s past that she hasn’t shared with Ted, namely her experience in the art and craft of murder, a journey that began in her very precocious youth.

Suddenly these co-conspirators are embroiled in a chilling game of cat-and-mouse, one they both cannot survive ... with a shrewd and very determined detective on their tail.

Ted and Lily are strangers who meet in a bar in the airport in London, England, on their way home to the States.  After a couple martinis, Ted tells Lily his wife, Miranda, is cheating and that he'd like to kill her for doing that.  She offers to help him and he takes her up on it.  Back in the States, they meet and start planning.  But alas, things don't go as planned.

I liked this story.  There were lots of twists and turns, some were convoluted but I went along with them.  Just when I thought I figured out what was going to happen, things changed ... and this happened a few times.  It's written in first person perspective in Ted, Lily, Miranda and a police detective's voice ... we get to know each of their pasts and how they have gotten to the place they are today.  Even though Lily was bad and  had done some not so nice things in the past, I liked her.  As a head's up, there is swearing and violence.