This book is interesting from a historical perspective. It presents a brief synopsis of the research conducted on chimpanzee communication and language until the mid-1970s, and a look at the possible future of such research. Such research was limited by the scientific theories of that time concerning the inability on the part of many scientists and people to conceive of other species having complex communication systems using sound (vocalizations) and the absence lack of computer systems and programs to interpret such sounds in concert with videos recording systems. Those systems did not exist at that time, and their use in current research have changed the views of both scientists and people about these subjects. .