I went for a couple of months recently without drawing or painting anything, mainly because I was distracted by work. But I’ve started sketching again, with a little help and inspiration from this book.
All of the below images are exercises or copies from the book. Click on them to see the full image.
Hatches and other marks 
Circles, spheres, and hatches 
Various shapes and marks 
Cubes and a sphere 
Glass, from different perspectives 
Sphere with shadow 
Cylinder and glass 
Kneeling figure 
My first ever skull, I think
