"Rotkoista" is a book by the famous Finnish author Konrad Lehtimäki, which tells the story of the adventures of a group of archaeologists who go to investigate an ancient mysterious excavation in a deep gorge. Interwoven with betrayal, exotic discoveries and mysterious events, the heroes' journey will be tense and dangerous. In this exciting novel, the author successfully combined the elements of mysticism, adventure and detective, which won the love of readers all over the world. "Rotkoista" is a book that will leave you impressed and amazed with its mystery and tension until the last page.