It's the sketchbook of Ovi Nedelcu, who does character design, visual development and storytelling. This is a 98-page hardcover filled with mainly cartoon style character sketches. There's a nice variety of interesting characters. I wish there could be more, given that the book is rather thin.
You can check out more of his work on his website.
(There are more pictures of the book on my blog. Just visit my Amazon profile for the link.)