Sin and Spirit Book Review

Adult Fantasy Romance Book Review - Sin and Spirit Book Review - Demigods of San Francision by KF Breene

In this Sin and Spirit book review I’m sharing my thoughts on the fourth book in the Demigods of San Francisco series by K.F. Breene. As usual, I will do my best to avoid major spoilers however there may be a few small spoilers in this review.

“Without fear, there is no courage. It is inaction that breeds fear. Be action. Be confidence. Fuuuuck meeeeeee.”

K.F. Breene, Sin and Spirit

I had the Demigods of San Francisco series on my TBR list for several months before I picked it up over last weekend. I haven’t been able to put the series down. It’s a fantastic low fantasy adult series that has memorable and loveable characters with a fantastic magical world.

Sin and Spirit book cover on tablet

Trigger Warnings

Since we don’t always get trigger warnings on books I like to give trigger warnings in my reviews. This can help people avoid certain triggers that could hurt their mental well being.

Possible Triggers in this book are:

  • Attempted Murder
  • Blood
  • Death
  • Decapitation
  • Hostages
  • Kidnapping
  • Murder
  • Occult
  • Profanity
  • Sexually Explicit Scenes
  • Violence

For a list of the triggers I look for you can check out this link here. This may or may not be a complete list of triggers for this book, I do my best to make sure I mark anything that could be a potential trigger but I may accidentally miss triggers.

Synopsis and Author

Sin and Spirit follows Alexis and Kieran as they try to figure out which demigod of Hades is trying to get at Alexis and her powers. Additionally, Alexis is trying to figure out her place in the unfamiliar territory of being a demigod’s girlfriend. 

Alexis has to confront her insecurities and try to adapt, train her spirit walker powers, and try not to be taken by power-hungry demigods who only want her for her power. Meanwhile, Kieran has to adapt to being the new demigod of San Francisco and show the world he is more than just his father’s son.

Once again K.F. Breene continues the story of Alexis and Kieran with all the same lovable characters from the first three books and a couple of fresh faces and enemies. This series will make you laugh, cry, cheer, and sit on the edge of your seat as you fall in love with memorable and complex characters.

Sin and Spirit Reading Experience

This book is slightly different from the last 3 books in that we get a few glimpses into the other characters. While we still get the points of view of Alexis and Kieran, we also get some from Bria and Daisy. Also, like in the last book we also get the point of view of Magnus which is our main villain for this book.

We are still in magical San Francisco following along as Kieran adapts and tries to prove himself as a force to be reckoned with among other demigods. We also see how Alexis is adapting to her role as the girlfriend of demigod Kieran. 

The book moves at a pretty steady pace starting right off with some action sequences that grip you and don’t let go. With a few action scenes paired with a few suspenseful situations, it’s hard to put the book down for any reason.

Writing Style

The ebook version of Sin and Spirit is 378 pages and 34 chapters. It took me about 5 hours to read from late afternoon through till evening. 

Like the last three books, this book is easy to read, filled with amazing characters, dialogue, and world building. K.F. Breene does a fantastic job with bringing her characters to life and making you fall in love with them. 

While once again we do get the point of view of our main enemy it’s not a lot and I understand why it’s done. Overall though I absolutely love this series and have had a hard time stopping reading in order to do tasks that life demands I do.

In this book I felt a wide array of emotions. I laughed as normal but this book actually had me ugly crying at one point. The characters are relatable even if they are magical and have powers. I love how unique this series is because the characters have dealt with situations lots of us have dealt with in our own lives. 

Sin and Spirit Book Review

Alexis and Kieran once again top my list. They have to be one of my favorite book couples. They work well together while also helping each other cope with changes and deal with their own issues. Their love is beautiful.

Once again I love the teenagers, Daisy and Mordecai. They are growing, training, fighting, and are written beautifully. Not many authors can get writing teenagers down this well, so I have to wonder how much personal experience the author has in dealing with teenagers. These two absolutely rock.

Bria’s character takes a little more serious approach in this book. We see her fiercely defend her found family and how protective she is. She still has the sarcastic and dark sense of humor we love but we get to see a side of her that shows just how fierce she really is.

Jack of course is one of my favorite of The Six. He’s dedicated, protective, sweet, and just one of the best guys. I absolutely love how amazing he really is.

The Six still top my list of loved characters. The way this team works together and supports the entire group. They really shine on their own in this book.

I do not like Magnus. Not just because he kills his children, but he has an overinflated ego and finds enjoyment in causing pain for our characters.

Aaron is another demigod on the scene in this book. While evil and brutal, he at least has an in your face attack method instead of trying to be sneaky. You absolutely know where you stand with this character.

Nancy is a desperate and sad demigod. While I want to feel bad for her because she only values herself as a seductress to get her way, I also feel like she is someone who would stab anyone in the back to get her way. She’s just slimy.

At first I really didn’t trust The Spirit Walker, but I have a sneaky suspicion he’s going to grow on me. He might be a flirt, maybe extremely forward, but I think he will do a lot of good for Alexis and the team.

Red is going to grow on me. She is the strong silent type in woman form and I just know she will end up kicking major butt at some point. I don’t care if she’s a little bitchy or unfriendly, she’s going to prove herself an extremely powerful asset to the team.

As per usual the world is interesting and really not unlike what we see in our own society with a few changes due to the magical nature of this world. We see that there is still a social hierarchy that can be hard to deal with when you haven’t been in it. 

I really loved the way K.F. Breene showed the human side of dealing with insecurities, emotions, and healing from a toxic upbringing. It makes these characters feel extremely relatable which just makes you fall in love with them even more.

I enjoy a book that makes me feel a wide range of emotions and this book (and series) really does that for me. While I haven’t cried at plot points in the last three books, this book did make me ugly cry. Though, I felt great joy, relief, and laughed a lot. This was a fantastic book.

If you liked City of Thorns by CN Crawford you will likely like this book and series as well. It’s a fantastic low fantasy based in San Francisco with amazing complex characters.

Sin and Surrender book cover

Star Rating

Before I rate this book I want to give you a bit of background about what my rankings mean. I typically read books that I check out through the Libby app with my local library or through Kindle Unlimited. 

I rarely buy ebooks unless they are cheaply priced or on sale. I also very rarely buy physical copies of books. I’m a bit of a minimalist so I have to absolutely adore a book to buy a physical copy that will be proudly displayed in my home.

So my ranking system is as follows:

  • 5 Stars equals I am buying a physical copy of this book. I will read this book at least 10 more times, it is the best ever.
  • 4 stars equals a great book. I might buy an ebook version when it’s on sale so that I can re-read it at least one more time.
  • 3 stars equals a good book. I likely won’t read again but I appreciate the story.
  • 2 stars equals “Meh.” I will not read this book again, it had a lot of problems and I did not care for it.
  • 1 star equals a bad book. I barely finished this book and I will never recommend anyone waste valuable book reading time on this book.
  • 0 stars is a did not finish book. I will never finish that book and it is banished.

Sin and Spirit is yet again another 5 star book in this series. K.F. Breene knocked it out of the park with fantastic characters that I’ve fallen in love with and a world that isn’t much different from our own. I can’t wait to see how this story continues.


  • Once again we get a finish where there is a slight cliffhanger while still feeling complete.
  • The closeness between the characters.
  • The character growth that we see in Alexis and Kieran is fantastic.


  • There is a spicy scene after a big loss that just doesn’t quite feel right. While I saw what the author was trying to do with it, it still felt like adding a spicy scene to add a spicy scene.

Final Thoughts on Sin and Spirit

I enjoyed the addition of a few more characters in this book. Again the story takes off from the beginning, it grabs on and doesn’t let go. You’ll have a hard time putting the book down. I cannot give enough praise to the creation of the characters in this series. This is a group of people I would love to know in real life.

More Book Reviews in this Series:

Have you read Sin and Spirit? What were your thoughts? Let me know in the comments below. Follow me on Pinterest for more like this and pin this to your favorite book boards.

Adult Fantasy Romance Book Review - Sin and Spirit Book Review - Demigods of San Francision by KF Breene

Demigods of San Francision by KF Breene - Adult Fantasy Romance Book Review - Sin and Spirit Book Review

Sin and Spirit Book Review - Demigods of San Francision by KF Breene - Adult Fantasy Romance Book Review


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