Why is the snake the only significant animal to talk to Eve? Why is it a dove that appears at Jesus Christ's baptism? Animals in the Bible are often quoted at important moments and deserve close attention to understand the profound meaning of the symbols they represent. Offering an audacious and interesting interpretation, the authors develop a theory of animal symbolism based on observation of the animals' zoological characteristics eventually leading the reader to understand fully the symbolic meaning of each animal.

The basis of their theory relies on their interpretation of the Great Flood that they describe as one of the first covenants between God and the humans appearing in the Bible when Noah is commanded to build an arc and gather all kinds of animals from each species. This bestiary offers an psychological interpretation of this episode as a metaphor for the acceptation by individuals of the various human instincts in their everyday behavior instead of their repulsing.

This animal stories presents itself as a means to study the Bible but also as a way to deeply understand human nature.