Complex sentence: The Vanguard Press operated as a respected independent literary house for 62 years, publishing the first books of Dr. Seuss, Saul Bellow, Marshall McLuhan and Joyce Carol Oates.
Split into simpler sentences: The Vanguard Press operated as a respected independent literary house for 62 years. Its catalog of fiction, poetry, non-fiction and children's literature included the first books of Dr. Seuss, Saul Bellow, Marshall McLuhan and Joyce Carol Oates.