The book is called Woodland Crochet and the author of the book is Kristin Rask. The fox pattern in this particular book was written by Kandice Soraya Grote. This book was part of a kit that included enough yarn for 2 amigurumi creatures, the crochet hook and two sets of safety eyes.

Additional materials:
Tapestry needle
Pair of black safety eyes (6 mm)
Black embroidery thread
Stuffing