A series of books that collects all the notable monsters, dinosaurs and creepy crawlers and creatures of Rifts North America into two juicy volumes with a number of new creatures. Each volume includes maps and new creatures, large and small, to help or plague player characters. Between them, these two volumes compile all the beasts of Rifts North America (unintelligent monsters, predators, notable animals and intelligent beings that are monstrous or animal-like in appearance or behavior) from all current World Books and Sourcebooks. In addition, Kevin Siembieda, Chuck Walton and Greg Diaczyk are adding some new monsters to make life in the wilderness interesting. Presented in alphabetical order, with maps showing their range and location, in two big books.