Complex sentence: Grass is best known for his first novel, "The Tin Drum" (1959), a key text in European magic realism, and the first part of his Danzig Trilogy, which also includes "Cat and Mouse" and "Dog Years".
Split into simpler sentences: Grass is best known for his first novel, "The Tin Drum" (1959), a key text in European magic realism. It was the first book of his Danzig Trilogy, which includes "Cat and Mouse" and "Dog Years".