"Official Report of the Niger Valley Expedition" is a fascinating book by the famous African-American writer Martin Robison Delaney. In this report, the author tells about a trip through the Niger Valley, which is located in West Africa. He describes in detail the encounters with local people, culture and natural conditions of the region. The book "Official Report of the Niger Valley Expedition" is not only a valuable historical document, but also a source of important knowledge about the African diaspora. Delaney skilfully combines factual data with personal observations, making the book engaging for readers of all ages and interests. "Official Report of the Niger Valley Expedition" is a must-read for anyone interested in African history and travel."