Complex sentence: In 1927 he went to Paris where he wrote his first major novel "Suuri illusioni" ('The Grand Illusion'), a story of bohemian life and a Finnish equivalent to the works of the American writers of the Lost Generation.
Split into simpler sentences: In 1927 he went to Paris where he wrote his first major novel "Suuri illusioni" ('The Grand Illusion'), a story of bohemian life. In terms of style, the novel is considered as the Finnish equivalent to the works of the American writers of the Lost Generation.