“Contacts” by Mark Watson (2020)

“I’ve decided to end my life.”

Ah, books about loneliness. My kryptonite. My toxic ex I can’t walk away from. No matter how I’m feeling, I always end up back here. Sometimes, however, it’s just what you need.

James Chiltern has just boarded the sleeper train from London to Edinburgh, just before midnight. His last social act is to send a message to all 158 contacts in his phone imparting one vital piece of information: he is going to kill himself. After he sends the message, he sets his phone to...