I would say Gabriel's Inferno was a beautiful, romantic and emotional book. I really like how Dante Alighieri's The Divine Comedy is significant to the story. I also like how the main characters are likely portraying Dante and Beatrice which becomes more interesting. 
 I really like Gabriel's transition from being a jerk to someone who is caring and protective to his lady love. His passion towards Julia is so romantic and gentle. *sigh* I also like Julia because of she is kind, innocent, sweet, compassionate and hardworking. 
 Scars might heal and we might forget about them in time, but they're permanent. 
 Both characters have demons on their pasts which hurt them and leave scars that marked their life permanently, but those scars helped them to be a better person and learn from their mistakes. They both deserve happiness and let go of whatever haunts. 
 Though I really enjoyed this book, but I find it too long which makes the story a little bit slow and Paul's character wasn't that much emphasized. I mean, he is Paul Virgil Norris and I really thought he is Dante's guide so that he could reunite with Beatrice. I think Rachel is more of Virgil in Dante and Beatrice's reunion. 
 I am looking forward to read the next book and hopefully it will be good. If you like romance, I recommended this book.