Complex sentence: In the original "Pacific Sun" weekly chapters, black-and-white illustrations accompany the text, and were included in the original edition of the book, and in the first paperback edition of the book, and in most if not all later editions.
Split into simpler sentences: In the original "Pacific Sun" weekly chapters, black-and-white illustrations accompany the text. These illustrations were included in the original edition of the book, in the first paperback edition of the book, and in most if not all later editions.