Lurlene McDaniel (born c. 1948) is an author who has written over 50 young adult books. She is well known for writing about characters struggling with chronic and terminal illnesses, such as cancer, diabetes, and organ failure. (From Goodreads.com)
Life Philosophy: "No one gets to choose what life gives them. You do get to choose how you deal with it." (From lurlenemcdaniel.net)
She has many series, sequels, and independent novels to offer young readers. All her books center around tragedy, and the love that comes before and after. It is often that you will read her book and cry at the end (I have done this many times in public places).
Some of my personal favorites by her: