Chris Dent does a lot of illustrations that have the common theme of cityscapes and buildings
The image is very busy not just by the people in it but by the amount of lines and the amount of detail that is in the frame. He uses very linear and fairly thin lines when making his drawings and most of them feature cities.
In this image he has put white blurry marks over the black, I think he has tried to make it look like snow and that it suggests its in the winter. There is also a Santa Claus in the foreground which makes me think it is meant to be New York City on Christmas Day.
I really like how busy it is and that he manages to add depth without using colours. Its mass amount of detail is something that makes this image so good in my eyes.