It's difficult to say without more context. He could be involved in the plot construction, bringing in unique storylines or twists. Maybe he's in charge of developing certain characters, giving them depth and personality.
Since we don't have much information about Chris Bouldin's role as an author in Barbara Delinsky's novel, we can only speculate. He could be contributing to the world - building aspect of the novel. This means creating the setting, whether it's a small town with its own unique culture and traditions or a big city with all its hustle and bustle. He might also be involved in the research for the novel, ensuring that any factual elements, such as historical events or professional fields (if relevant in the story), are accurate. Additionally, he could be part of the team that decides on the overall tone of the novel, whether it's a light - hearted, humorous tone or a more serious, dramatic one.