Comment by vidarh

You seem to be projecting assumption here. The comment you replied to says she's written books they've seen in a book store.

Also, note that the average book sells very few copies. Even traditionally published books. Some books have higher production values that'd justify a lot of extra effort, but tends to be linked to name recognition for people with very established names. It's not at all a given that all that much money has gone into producing these books.