In the audiobook "The Fourth Side of the Triangle," Ellery Queen presents a fascinating whodunnit that unravels complex mysteries and mysterious events. The story begins with a crime that leads to the unraveling of a confusing case. The main character, a detective, encounters several suspects, each of which has its own secrets and motives. The plot is full of unexpected twists and intellectual trials, which makes it especially attractive for lovers of classic detective stories and thrillers.