Grand Duke Oleg Prophetic is one of the key figures of the early history of Ancient Russia and at the same time one of the most mysterious. Many historians agree that Oleg is identical to one of the most popular heroes of Scandinavian sagas - Orvar-Odd, also known as Odd Arrow. The authors of the book, carefully studying domestic and foreign sources, are trying to understand a significant number of inconsistencies and riddles that are abundant in these documents, sometimes coming to conclusions that are quite logical, but not always "in line" with the established views on the past.