What is two differences between Chapter 1 of the books and part 1-3 of radio play?

In Chapter 1 of the book, there is typically more detailed character development and background information, providing readers with deeper insights into the protagonists' thoughts and motivations. In contrast, Parts 1-3 of the radio play often rely on dialogue and sound effects to convey the story, leading to a more immediate and dynamic experience but sacrificing some of the narrative depth. Additionally, the pacing in the radio play may be quicker, as it needs to maintain audience engagement through auditory means rather than descriptive prose.