This aspect is captured in the cataloged book data. The term " byline " is used to note the author name used on the cover or title page. The main entry for the byline comes from the cover when cover and title page differ. The term " author " is used to note the name of the actual person who wrote the book.
The stories are not about the same man or woman, but follow the same general plot outline. I have collected them into a group because a lot of people say they like Uncle Bob and "his" shenanigans. They are usually about Uncle Bob seducing somebody, or being seduced. Sometimes a story is hard to put into a category.