"This is a book about drawing pictures of bacon for Karen. That's why it's called 'Pictures of Bacon for Karen.'" Well, that explains it.
...Actually, it does, for the most part. More specifically, Andrew's bacon-related drawings (accompanied by philosophical commentary) are the result of trying to pass the time during work meetings, which apparently double as a wellspring of creativity from which bacon doodles burst forth.
Why will you read Pictures of Bacon for Karen? Because it has the word "bacon" in it. Also, as one of Karen's co-workers explains, "it's bacon, it's droll, and its 12 pages should waste at least 3 minutes of your workday."