Complex sentence: In the preamble, Pillai states that he wrote the book with the intention of creating a model of historical romance in Malayalam; historical events of the eighteenth century serve as the skeleton of the story.
Split into simpler sentences: In the preamble, Pillai states that he wrote the book with the intention of creating a model of historical romance in Malayalam. The novel is identified as a literary work done in the manner of historical romance, in which historical events of the eighteenth century serve as the skeleton of the story.