It's obvious after reading through Foes that more books going into deeper details of various factions such as the Coalition and Zitichic are down the road. What this book offers is a decent selection of base advasaries to throw against your heroes. This book alone will allow you to run years worth of adventures and is a must have for anyone running Savage Rifts.
That being said the book has one major drawback; art. The book is sparsely illistrated and many of those illistrations are mediocre at best. Many of the creatures have no art, only text descriptions while the images of mech are perhaps the poorest in the book. Normally I wouldn't hold uninspired art against a product but Rifts has some very iconic creatures,mech, and characters that those who never played Palladium Rifts will be at a loss or just nonplussed with what some of these characters physically look like.
Overall this is a worth while book only marred by its visual presentation.
[4 of 5 Stars!]