The Geology of the Netherlands East Indies is a collection of lectures delivered at the University of Michigan in 1921 and 1922. The information was shaped with great industry and skill by Laurence M. Gould, from the Department of Geology at the University of Michigan, the source materials consisting of notes made by him during the lectures. The manuscript was added to by H. Albert Brouwer. The Geology of the Netherlands East Indies provides an outline of a field for geological research that is full of promise. As may be noted from the bibliography given in the Appendix, a great deal has been written about various phases of the geology of the Netherlands East Indies, but a large part of the subject matter appeared in this book for the first time in English.