This article presents information on the book "Climatic Change: Evidence, Causes and Effects," edited by Harlow Shapley. Most scientists are now agreed that the climate is again changing over very great areas of the world. This process has been in operation for at least 65 years and perhaps a century, and has been accentuated in the past two decades. This change in climate may be a mere temporary swing of a few decades or centuries, an insignificant period from the viewpoint of the geologists. The change may, again, mark the end of what Shapley calls the Little Ice Age, which began in certain regions about the time of Britain's first Queen Elizabeth, and has lasted until the present.