Complex sentence: During this period, Percy read the works of the Danish existentialist writer Søren Kierkegaard, and the Russian novelist Fyodor Dostoevsky; he began to question the ability of science to explain the basic mysteries of human existence.
Split into simpler sentences: During this period, Percy read the works of the Danish existentialist writer Søren Kierkegaard and the Russian novelist Fyodor Dostoevsky. He began to question the ability of science to explain the basic mysteries of human existence.