Complex sentence: It is through his own writings, however, that Sébastien Azzopardi reached a larger audience--he created an universe of his own, which attempts to distance itself from the traditional bourgeois drawing-room drama.
Split into simpler sentences: It is through his own writings, however, that Sébastien Azzopardi reached a larger audience. He actually created a universe of his own, which is tries to step back from the traditional bourgeois drawing-room drama.