Curt Stern's Principles of Human Genetics is the most interesting and readable introduction to this subject that you will find. Despite the advances in genetics and recent map of the human genome, the principles covered in this book are still relevant. In 1962, I took a graduate course at the University of Texas in Austin using the second edition of this book which I still possess. Dr. Stern was away for a semester and his grad student taught the course. Forty years later I still use this book as a reference. I just ordered the 3rd edition published in 1973 for an "update". This book is a real classic and would get anyone interested in human genetics with its photos and pedigrees.