Since the publication of my two animal books, "Kazan, the Wolf Dog" and "The Grizzly King," I have received so many hundreds of letters from friends of wild animal life, all of which were more or less of an inquiring nature, that I have been encouraged to incorporate in this preface of the third of my series - "Baree, Son of Kazan" - something more of my desire and hope in writing of wild life, and something of the foundation of fact whereupon this and its companion books have been written.