I recently put together a collection of drawings and sketches of done over the past year (or so). It's 28 pages and filled with all kinds of doodles, pencil drawings, pen & inks, and composition studies. I'll have it at the conventions I'm lined up to attend this year, including Wizard World Sacramento, Gen Con, Wizard World Reno & San Jose.
The sketchbook is also available online here: http://www.lulu.com/shop/thomas-denmark/thomas-denmark-sketchbook-2015/paperback/product-22220203.html
Thanks for checking it out.