Complex sentence: His first book, "Typee" (1846), a highly romanticized account of his life among Polynesians, became such a best-seller that he worked up a sequel, "Omoo" (1847).
Split into simpler sentences: His first book was "Typee" (1846), a highly romanticized account of his life among Polynesians. It became such a best-seller that he wrote the sequel "Omoo" (1847).