Krahn, Fernando.  Here Comes Alex Pumpernickel! Boston: Little, Brown & Company, 1981.

Unfortunately, this book is out of print.  This is a stop-gap scan since the book is currently unobtainable.  If the book is reprinted, by using these scans you agree to buy a copy of the book.

This is the first book about Alex Pumpernickel.  It is actually a set of mini-stories.