The Fourth Side Of The Triangle by Ellery Queen

In this gripping mystery, a complex web of deceit and passion unfolds as a prominent architect is found murdered, leaving behind a tangled trail of secrets and lies. The investigation delves into the lives of the architect's family and acquaintances, revealing hidden relationships and motives that challenge the boundaries of love and betrayal. As the detective unravels the truth, the story explores the intricate dynamics of human emotions, leading to a surprising and thought-provoking conclusion that questions the very nature of trust and fidelity.