3 novels in 1 book, Species Imperative by Julie E. Czerneda, DAW

3 novels in 1 book, Species Imperative by Julie E. Czerneda trilogy, Survival, Migration, Regeneration are in this 1 science fiction, trade paperback book, DAW Books. Alien species and biology fiction. A little damage to the front cover and first few pages, weight 2.2 lb?.