The book "Additional Mounds of Duval and Clay Counties, Florida; East Florida Mound Studies; Special Mounds on the Florida Coast North of the Saint John River" by Clarence B. Moore is an important source of information on archaeological investigations of historic sites in these areas. Florida The book reveals important aspects of the culture and life of previous civilizations that inhabited these territories, revealing the immense significance of all the barrows and artifacts discovered. The author takes the reader on a fascinating journey into the past, where each mound becomes a key to understanding the consequences of past civilizations.