This was surprisingly good, despite my vow to stop reading YA fiction because I am a 50 year old woman, dammit.

Set in the Grishaverse, we come to fictional Amsterdam and its gangs. A fake-Chinese (Shu) agent has found a way to enhance the powers of Grisha greatly but also addicting them hardcore to the stuff. The Shu is now in the hands of the Fjerdan, an anti-Grisha witch-hunting nation in fake Scandinavia. The merchants of Ketterdam want to free him, and so hire the services of Kaz Brekker, a genius amongst gang criminals, to free the Shu for 30 million, from the super high security Ice Court. It's heist time! Kaz has a crew of six people, and off they go.

While I rolled my eyes plenty of times that these super-criminals were all 16 or 17 years old, I just changed their ages in my head, which made it far more enjoyable and believable for me. The heist was very entertaining, the different PoVs were fun to read, and the cliffhanger at the end makes me want to read on. Naturally, I really ship Jesper and Wylan.

Now if only the broody hero Kaz gets toned down a bit in the follow-up, I'll gladly recommend this to anyone.