As they got older, they realized they wanted different things for their lives. Kate wanted marriage and children. Tully wanted a career and fame. Even when they both succeed in their dreams, they envied each other. They lived completely opposite lives but neither one was perfect. The book shows no matter what you have, there is good and bad, but if you have no one with whom to share it, it doesn't really matter. Even when they fought, they still remembered how important their friendship was. Through the rest of their lives they continued to be best friends and supported each other through their many downfalls.
First published in February 2008, by St. Martin's Press, Firefly Lane is a book to which any girl or woman can relate. Everyone has had a best friend and knows that friendship is stronger than any other relationship. Any girl, high school and up, could find value in this story and will fly through the 528 pages. The story carries the idea of always wanting what you don't have and wishing you were something you aren't. That is an idea almost anyone can understand.