Complex sentence: This leads him to respond to a fantastic advertisement for a "Magic Kingdom" which he purchases, suspecting some deception behind it; he is shocked to find that the kingdom is real, and in a state of collapse.
Split into simpler sentences: This leads him to respond to a fantastic advertisement for a "Magic Kingdom" which he purchases. Suspecting some deception behind it; he is shocked to find that the kingdom is real, and in a state of collapse.