"Sea Affair" (海公案) is an ancient Chinese work consisting of a collection of Chinese detective stories, the attribution of which is unknown. This is one of the oldest examples of literature of the criminal detective genre in world literature. Each story investigates mysterious crimes, mysterious events and intrigues, revealing the intelligence and skill of a true investigator. Thanks to the exquisite plot, the fascinating presentation of the material and the unexpected solutions to each mystery, "Maritime Affairs" leaves the reader in tense anticipation of the next revelation. This book has become a classic of the crime genre and remains a must-read for all fans of literary mysteries.