Sun-Kissed Christmas (Summer) by Katherine A. Applegate

After Katherine Applegate graduated from college, she spent time waiting tables, typing (badly), watering plants, wandering randomly from one place to the next with her boyfriend, and just generally wasting her time. When she grew sufficiently tired of performing brain-dead minimum-wage work, she decided it was time to become a famous writer. Anyway, a writer. Writing proved to be an ideal career choice, as it involved neither physical exertion nor uncomfortable clothing, and required no social skills.

Ms. Applegate has written more than one hundred books under her own name and a variety of pseudonyms. She has no children, is active in no organizations, and has never been invited to address a joint session of Congress. She does, however, have an evil, foot-biting cat named Dick, and she still enjoys wandering randomly from one place to the next with her boyfriend.

Owner Reviews, Ratings, Comments and Criticism
I've read the whole series, and I loved it. "Beaches, Boys, and Betrayal" is my favorite, but this book is an excellent conclusion. Austin and Summer make the best couple!