Complex sentence: In the novel's commentary, Goldman writes that he added nothing to the "original" Morgenstern text, although he comments that he did write one original scene, a loving reunion between Buttercup and Westley, but claimed that his publisher objected to this addition.
Split into simpler sentences: In the novel's commentary, Goldman writes that he added nothing to the "original" Morgenstern text. He did write one original scene, a loving reunion between Buttercup and Westley, but, he says, his publisher objected to this addition.