After lunch last Friday, I visited a bookstore in North London (Postal code N22). The staff told me that the bookstore is launching a section for self-published books. I thought this was finally “up my alley” until he mentioned that it was for novels only. I glanced over the stack of books that he was arranging around the counter and I saw a cookbook. 
I then asked him “It looks like you are also selling self-help books for example, I can see cookbooks there!”. Unfortunately, he disagreed that cookbooks belong to the category of self-help. I added, “I can also see travel guides there. They are certainly self-help books without a doubt”.
At this point, I saw the rolling of the eyes. I put on a “professional” face and uttered thank you before leaving the store with an unresolved question that cookbook is a self-help book or not.