The Bullet That Missed (Thursday Murder Club, #3) by Richard Osman

It is an ordinary Thursday, and things should finally be returning to normal. Except trouble is never far away where the Thursday Murder Club are concerned. A local news legend is on the hunt for a sensational headline, and soon the gang are hot on the trail of two murders, ten years apart. To make matters worse, a new nemesis pays Elizabeth a visit, presenting her with a deadly mission: kill or be killed… While Elizabeth grapples with her conscience (and a gun), the gang and their unlikely new friends (including TV stars, money launderers and ex-KGB colonels) unravel a new mystery. But can they catch the culprit and save Elizabeth before the murderer strikes again?