Rating: 4/5 
 ***Minor spoilers*** 
 In this series we're introduced to Ketterdam, another area of the Grisha universe where gangs, gambling houses, and brothels thrive. Jurda is something akin to our caffeine. People use it to have the energy to stay awake, but there's a new version - jurda parem, that is much more dangerous. Give it to a Grisha and it's like an amplifier on steroids. They become powerful and unpredictable. Heartrenders can take out a massive crowd in the blink of an eye. Fabrikators can turn lead into gold. And after the high is over, the Grisha craves for it and could die if they don't get more. The man behind creating it? Locked behind bars in the most secure building in Fjerda's capital. But when Kaz, leader of the Dregs gang gets offered 30 million for getting that scientist out of prison, he assembles a crew of five other members, some more willing than others, and set out to Fjerda for the most insane heist they could ever hope to commit. 
 Although the Grisha series went downhill for me after the first book, I was excited to get into Six of Crows because so many people loved it. It takes place in the Grisha universe but with entirely new characters and a city we've never seen before. We get the perspectives of both powerless humans and Grisha, which was a nice change from Alina who not an ordinary Grisha by any accounts. While I really enjoyed this book and was eager for more and enjoyed it more than Shadow and Bone, I couldn't rate it higher because I couldn't get attached enough to the characters. This book is told from six alternating perspectives, one for each member of Kaz's crew. While after some time I was able to keep track of who each character was, it was hard to get heavily attached when each character had only so much allotted "screen" time. We delve into the backstory of each character while also experiencing the heist and it simply didn't leave enough room for me to get attached to everyone. I really liked Inej and Nina but wasn't quite able to develop any sort of bond to the other characters. 
 What I really did like was that there was so much action present throughout the book. It started off a bit slow but it was understandable because not everyone has read the original Grisha series and it can be difficult to grasp at first. But after we actually get into the mission, it's nonstop action. It was nice that the heist was actually difficult, because sometimes there's this huge goal in mind and the characters are able to do it within a few chapters with barely any problems. In this book there are a lot of obstacles to worry about, which I found much more realistic. The twists and turns were also great! I was able to predict some of the more obvious ones but Kaz's intelligence (the others too, but mostly Kaz) blew me away several times. I was surprised many more times than I was able to predict what would happen. 
 Overall, this was a great read but I just needed some more emotional attachment to make it a 4.5 or 5 star book. Hopefully in the next book I'll be able to get that. It has a cliffhanger ending that was a bit abrupt but still worked. You don't necessarily have to read the original series to understand this, but it may help because I found that the Grisha weren't explained in as much depth as in the original series. I've seen that all the different types were a bit confusing to some people at first, so if you don't plan to read the original series first, you should probably just Google the types of Grisha so that you're prepared. Regardless, I'd definitely recommend you read this because it was entertaining, exciting, and suspenseful all at once.