Sophie Hannah's unguessable thrillers have readers hooked!

INGENIOUS! I challenge anyone to unravel this clever whodunit ⭐⭐⭐⭐⭐

Sophie Hannah could well be our modern Christie, such a deliciously complicated plot. Her best yet!! ⭐⭐⭐⭐⭐

This murder mystery really did blow my mind. It kept me awake at night! Absolutely brilliant ⭐⭐⭐⭐⭐

This lived up to its press for me. I loved every page -- a truly impossible puzzle!! ⭐⭐⭐⭐⭐

What if having a best friend was the most dangerous thing you could do?

A killer that the police are calling ''Billy Dead Mates'' is murdering pairs of best friends, one by one.

Before they die, each victim is given a small white book...

For months, detectives have failed to catch Billy, or work out what the white books mean. And then a woman, scared by what she''s seen on the news, comes forward.

Stand-up comedian Kim Tribbeck has one of Billy''s peculiar little books. A stranger gave it to her at a gig she did a year ago. Was he Billy, and does he want to kill her? Kim has no friends and trusts no one, so how - and why - could she possibly be Billy Dead Mates'' next target?