We really don't need more data to know other animals grieve and mourn the loss of family and friends and I'm sure as time goes on more and more species will be added to the list of animals who grieve. But for those who do want more, a book called Animal Grief: How Animals Mourn was recently published that contains new information on how a wide variety of animals respond to death. Accompanied by striking photographs of a wide range of animals is a text filled with new information about animal grief. Topics covered include animal souls, self-awareness, the neurobiology of grief and mourning, mourning rituals, stages of grief, and numerous examples of grief in a wide variety of animals, including elephants, chimpanzees, cats, dogs, and various birds. A large amount of information is packed in its 80 pages and it's an easy read. - Marc Bekoff - Professor Emeritus of Ecology and Evolutionary Biology at the University of Colorado, Boulder.