In the seventeenth century white explorers and settlers encountered a tribe of Indians calling themselves Lenni Lenape along the Delaware River and its tributaries in New Jersey, Delaware, eastern Pennsylvania, and southeastern New York. Today communities of their descendants, known as Delawares, are found in Oklahoma, Kansas, Wisconsin, and Ontario, and individuals of Delaware ancestry are mingled with the white populations in many other states. The Delaware Indians is the first comprehensive account of what happened to the main body of the Delaware Nation over the past three centuries.

C. A. Weslager puts into perspective the important events in United States history in which the Delawares participated and he adds new information about the Delawares. He bridges the gap between history and ethnology by analyzing the reasons why the Delawares were repeatedly victimized by the white man.