Designer/Illustrator Wil Freeborn from Scotland has a new sketchbook out called A Sketchbook: Selection of Drawings and Watercolours Made in Scotland. It's 44 pages, paperback and available on his Etsy site.
Some of the artworks come from his website and Flickr site which you should check out.
Also check out more sketchbooks at http://www.parkablogs.com/category/tags/sketchbooks