Knocking off another book of my tbr pile, I loved this book!1. Mystery. When you meet someone for the first time, you get to know them. But, what if you never got a chance. How do you do that? I love that Summer began to know who her sister really was by seeking out answers. Getting into the mystery is super easy and lots of fun. I kept wanting to read the journal, find old friends, ask questions.2. Characters. The characters are great and well rounded. I love getting into Summer’s shoes. Her voice is loud and very clear. As if I can hear it in my head. There were moments were I totally lost myself in the book and hadn’t even realize it. Even the minor characters helped Summer shaped who she was and what she is learning.3. Love. Despite all the craziness of learning about Shannon’s sister, Summer herself found love. I like that there is no insta-love but a clear friendship growing into more.4. Parents. This is another story were family is a very important dynamic in both Shannon’s and Summer’s life. Families are not perfect and this family had their fair share of drama. Still, this family made it through.5. Contentment. Even after everything that Summer uncovered, after learning so much about her sister, she decided she knows what she wanted to know. I really love how well Summer learn to be comfortable in her own shoes. Always under the shadow of her sister, Summer finally stepped out of that, creating her own path.This is an extremely well written, great book. A wonderful original story, it achieves an awesome reader experience. A provocative tale of mystery and a secret journal, …Then I Met My Sister is insightful.