What is the authors purpose of the book "the fault in our stars"?

In showing the pain that losing a friend or loved one causes as well as demonstrating that disabled people or those with illness can live normal lives too

Singular third person pronouns are “he,” “she,” “it,” “his,” “hers,” “him” and “her,” and third person plural pronouns are “they,” “them” and “their.” the number of people to which you are referring should always match the pronoun you choose (“he” to refer to one male, “they” to refer to more than one male).

True the root of beautiful is beauty