This isn't a recent book. Peterson describes situations for some wild animals in the late 20th century. Their habitat and human relations with wild species have increasingly deteriorated since. Readers should consider this book a historical account rather than a contemporary one.
Brenda Peterson's father was an employee of the U.S. Forestry Service. Her early childhood was spent in a wilderness environment. She encountered wild animals and felt a kinship with them.
Peterson loved the story of Noah's Ark because she interpreted the command to preserve animals to mean that animals had souls that made them worth saving. As a child she constructed a small ark out of balsa wood and placed miniature plastic animals inside it. She would sketch the inside of Noah's Ark as "the peaceable kingdom". This is a utopian idea of interspecies cooperation that is derived from a prophetic Biblical passage (Isaiah 11:6). It is supposed to happen after the coming of the Jewish messiah. A famous depiction of "the peaceable kingdom" was painted by artist Edward Hicks in the 19th century. The image of the painting reproduced below is public domain.
Peterson includes a number of striking instances of interspecies cooperation in her memoir. The most notable is probably the research dolphin that warned Peterson's pregnant sister about the health of her baby. She also mentions a friendship between a Siberian husky and a whale. These are heartwarming and inspiring.
There are also sad tales like the story of the real Smokey Bear, a cub who was rescued from a forest fire and brought to live in a prison called a zoo in Washington D.C.
Just know that if you love animals and believe in animal rights advocacy, you will want to know about Brenda Peterson.