Well, forget about it! There's nothing a book can teach you. Go and talk to the philosophers of those races and you MIGHT begin to understand a small percentage of that philosophy. In a book you will find only misconceptions. Written by people that neither live, nor embrace that philosophy, a book is destined to be flawed. Further by having been written by a member of another race there's no chance to understand what a philosophy of another race is about. You will read what the author has in prejudices and expectations but no truth. Further ...
You await to read a book about philosophy of the elves, dwarves, minotaurs and so on?