My answers are three:
This book focuses primarily on special foods that you make on special occasions and/or more often for very special people.
Many of the recipes for typical and special foods are so good that they are simply too good to ignore.
The cooking environment and equipment available to the home chef are very important, as are cooking techniques, and they are covered conceptually and often in detail in this book. Likewise acquiring quality ingredients at the best prices, including processing and storing those ingredients for best results, are also included topics.