The grey sketchbook

I just finished the last page in a grey sketchbook that I was using for regular sessions at Life Drawing. This is Mark, looking suspended as the stool doesn't show up. I was drawing with black and white Prismacolor pencils. Good practice for studying light and shadow - but a controlled medium. Next book will be working in colour with a "looser" medium for a change. Good to switch things around every now and then.