"CLUSTERF★CK is the first great thriller of 2026! It's a novel that truly lives up to its name." ★★★★★

April—a married woman—never imagined that a simple encounter with a charming stranger would lead to a deadly partnership.

But when the self-assured Eddie approaches her, undeterred by her wedding ring, she can't resist his proposition.

As their twisted alliance unfolds, leaving a trail of death and destruction in its wake, it's impossible to tell who is actually pulling the strings.

With its unpredictable twists and turns, CLUSTERF★CK promises to be one of O'Sullivan's best novels yet!