This is probably the most frustrating book I ever read, and I read a lot. Now, before I dive into the negative things, I'm going to say what I like about this book. 

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I enjoyed how easy it was to follow the story. The chapters weren't too long, and I finished the story in 2 days. I also like how this book explains the book series The School for Good and Evil and how the schoolmaster turns out to be evil. 

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Now, onto the things that I dislike. I hated how inconsistent the two main characters were, one minute, they were ready to kill each other; the next, they were brother in hands again, and their love was never stronger. This happens so many times in the book that I want to scream and go right into the pages and tell them to pick a side. Moreover, the mindset of the two brothers was kinda weird. They both thought that if they had another friend or lover, they would be evil and replace their brothers. Which was not right, I mean, they are immortal, and only having each other company for 100 years can get boring. 

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Furthermore, I felt the conflict between the two brothers was forced and unnecessary, I mean, if Rhian and Rafal had just sat down, drank a cup of tea, and confessed their resentment, the ending wouldn't have happened. And they are 100 years old; I would expect them to be more mature. 

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This book tore me and got me thinking about it days after, not just because of the character's switch-up but because of the "loving siblings to enemies" trope, my least favorite. So the ending was torturous for me, but I could never seem to put it down, like something was grabbing me to finish the book.  ​

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Overall, I wouldn't recommend this book unless you want to know the prequel story to the series of The School for Good and Evil and if you like to enjoy the trope of "siblings to enemies."