drawings/doodles of subject matter

These are some drawings/doodles of the main character of the book, 'Terry'. I tried to draw what he might look like, and tried him in various positions and with different facial expressions.

I then went on to draw some different cars and taxis, as my book is about a taxi driver. I researched various cars and tried to replicate what they looked like. 

Finally, I drew some of the potential locations/landmarks that the book could be held in.