The great Ron 5 cover. The Great Ron series of picture books is a set of picture books created by a father according to his children's real life experiences, with a total of 5 volumes. Therefore, there are five different covers. The book selects typical situations in the process of children's growth, endows them with rich fantasy, poetry and philosophy, restores the innocent spiritual world of children, and guides parents to slow down, understand their hearts and enter their world.