Well, if we consider 'a simpleton good stories' as a way of approaching Charles Read's works, it could imply that his works have an element of naivete or simplicity. Maybe they are the kind of stories that don't require a lot of complex analysis and can be appreciated at face value. For example, the characters might be very basic in their motives and the plot might be uncomplicated, like in traditional folk tales that are easy to follow and tell a simple moral or story.
I'm not entirely sure who 'Charles Read' is. If it's a less - known author, perhaps the works, as seen through the lens of 'a simpleton good stories', might be simple and straightforward in their narrative, easy for the common person to understand and enjoy.