Final answer:
The salon professional's name, client's name, scheduled service, date, and client's phone number are typically included in the appointment book.
Step-by-step explanation:
In the context of a salon, the details such as the salon professional's name, client's name, scheduled service, date, and client's phone number are typically included in the appointment book. The appointment book serves as a centralized record for managing and organizing appointments with clients. It helps salon professionals keep track of their schedule and ensures that all relevant information is readily available when needed.