Sin and Lightning Book Review

Adult Fantasy Romance Book Review - Sin and Lightning Book Review - Demigods of San Francisco by KF Breene

In this Sin and Lightning book review I’m sharing my thoughts on the fifth book in the Demigods of San Francisco series by K.F. Breene. As usual, I will try to keep spoilers to a minimum however, there may be a few small spoilers in this review.

“A dead body pitched over the side and gave a thumbs-up on the way down.”

K.F. Breene, Sin and Lightning

The Demigods of San Francisco series was on my TBR for awhile before I picked it up to read it. It didn’t take me long to fall in love with this series and so far every single book has gotten 5 stars from me. 

Sin and Lightning 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:

  • Blood
  • Bones
  • Death
  • Gun Violence
  • Occult
  • Poisoning
  • Profanity
  • Sexual Assault Mentions
  • Sexually Explicit Scenes
  • Torture
  • 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

Alexis and Kieran are trying to find powerful people to add to their growing team as they prepare for the summit in just a couple of months. Kieran is also trying to find potential allies before the summit arises as well. We follow the two as they try to convince power people to join their team by proving that Kieran isn’t like other Demigods.

This book will suck you in and keep you on the edge of your seat wondering if these horribly wronged people will see the truth in Kieran and join the fight to make changes in the magical world.

K.F. Breene has given us this wonderful magical world with mortals and those with magic passed down from the gods themselves. She creates characters you fall in love with and gives us a team you just can’t get enough of. 

Sin and Lightning Reading Experience

Unlike the last books in the series we aren’t just in San Francisco. We travel to a mountain in Montana, a small mortal only town in West Virginia, and even all the way to Egypt. This is a fantastic change of pace as we get to see the team work together outside of their normal element.

As per usual we get the perspectives of Alexis and Kieran. We also get the point of view of a new and very powerful person. Thankfully, we have no perspectives from potential enemies which makes this one of my favorite books in the series.

There is a lot that happens in this book which keeps it moving at a pretty steady pace. While I didn’t ugly cry in this book there was plenty of laughter and on the edge of your seat suspense. 

Writing Style

The ebook version of Sin and Lightning comes in at 435 pages in 31 chapters of action packed suspense and mystery. While I wouldn’t say the other books were predictable this book did throw me for a bit of a loop. I was not expecting the ending that we got from this book at all.

I could not put this Sin and Lightning down and read it in an evening as K.F. Breene brought more characters in and brought them to life. So not only did we get more of her amazing world building but we also got more character creation and growth.

Sin and Lightning Book Review

The characters I’ve been raving about in the last reviews of this series have pretty much all stayed put on my favorites list with a couple of new additions. So as per usual I love Alexis, Kieran, Daisy, Mordecai, Bria, The Six, and the ghosts.

Dylan and Jerry are new characters in the mix and I love them both for different reasons. Dylan strikes me as that nerd who’s hot but doesn’t realize it. He’s a sweetheart and I’d probably trust him to guard my drink at the bar. 

Jerry is a big teddy bear, he’s like a bouncer who will have your back no matter what. He’s another sweetheart to add to the group and a smart addition to the growing team around Kieran and Alexis.

Lydia is a demigod of Hades and I do not like her. She’s rude, manipulative, and gross. 

Flora is a demigod of Zeus and she is brutal, uncaring, and quite frankly a spoiled brat who thinks things should just be handed to her.

I enjoyed this book a lot as the pacing of it was pretty quick. It was one action scene into another. I loved the teamwork of the characters involved the most. I laughed a lot, it has heartwarming moments, and the non stop action kept the book interesting.

I highly recommend this book for low fantasy romance fans. If you liked City of Thorns by CN Crawford this might be a great choice for you as well.

Sin and Lightning 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 Lightning gets 5 stars from me. The action scenes, the heartfelt conversations, and the laughs made this a fantastic book from start to finish. That ending was perfect in everyway and I am sad that the next book is the last one in the series.


  • I did not see the twist coming in the last action scene.
  • The loyalty and love of the found family.
  • The action scenes were fantastically written and described.

Final Thoughts on Sin and Lightning

This series has quickly proven to be one of my more favorite series. It’s not an epic fantasy or long winded in any way which makes it a good series to read in between some of the harder hitting fantasy books. It’s fun, funny, and is really good about leaving you feeling good after reading it.

While the books do keep you in suspense with the action that happens and hits you in the feels from time to time, it’s a great laid back read.

More Book Reviews in this Series:

Have you read Sin and Lightning? Let me know your thoughts 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 Lightning Book Review - Demigods of San Francisco by KF Breene

Demigods of San Francisco by KF Breene - Adult Fantasy Romance Book Review - Sin and Lightning Book Review

Sin and Lightning Book Review - Demigods of San Francisco by KF Breene - Adult Fantasy Romance Book Review


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