A book's dedication page should address the people who the author is dedicating the work to and should tell why the book is being dedicated to the chosen people. The reason for dedication should be personal and show how important the people dedicated are to the writer's life. For example, it may provide a short memorable story about the person or include a joke between the writer and the person.
The writer should also choose how to name the people. Family members and friends may be named less formally than colleagues, and nicknames and first names are suitable for them. When addressing someone formally, titles like "Dr." or "Mr." may be used. In the end, the type of relationship between the author and those dedicated will determine the right way of addressing and reason for dedication.