I was a bit hesitant going into this book after finishing the trilogy. The trilogy had such an exciting vibe that I was worried it wouldn't carry over. I was pleasantly surprised that it had some of those mystery vibes but in a fun way. It was exciting to read this story from the POV of Jameson and Greyson and have Avery at the center of it all. She was very prevalent but mostly a side character, so if you were looking for her to be at the center, this might not be for you. It was also a bit difficult for me to figure out exactly where in the timeline this was until the very end, where it circles back to the ending of the third book, so I do not recommend reading this as a standalone while you're reading the series, it needs to come after you finish as Book 4.

The flashback scenes helped me understand the relationship between the grandfather and the boys. What I found the most intriguing is the slight focus on the deeper connection that Jameson and Greyson have that is different than Nash and Xander. Emily is indeed a core memory for these boys, and it still affects them.

One of the reasons I didn't rate this four stars, which I was initially, is the book's format. It is a dual POV and would switch back and forth between Greyson and Jameson to keep the timeline correct. While that was appreciated, it took everything in me not to tab all Jameson's chapters and read his story first and then go back and read Greyson's. I'm glad I didn't at the end, but it was hard to control the urge.