This is standard Demetri Martin fare, with drawings insightful, funny, jarring, and often, some combination of the three. To say I 'read' this book is not quite an adequate description. I flipped through the pages in approximately 20 minutes, chuckling at some, immediately flipping past others, and thinking deeply about a select few.
"This Is A Book" or "Point Your Face at This" may be better for Demetri Martin rookies, but "If It's Not Funny It's Art" will please fans as much as they probably expect.