I heard a description of a book in 2015 or 2016 in school. The target audience was probably 8-12 years old, but the teacher did say that it was more difficult than the other choices to read for 6th graders (which included Dark Life).
This book was about a really smart teenager (I believe 17) who I think was a thief/criminal. They (I think he) were committing a heist or stealing something, maybe a diamond. The teenager had a quite unique name.
The drawing on the cover was completely solid colors, no shading. The cover had a fancily cut diamond, I believe some glasses, and a red, white, and black color scheme. The background was either red or black and the diamond was definitely white. The glasses were either red or black, whatever the background wasn't. It looked sort of like this: