Complex sentence: The season mostly covers the events of "A Clash of Kings", the second novel of the "A Song of Ice and Fire" series by George R. R. Martin, adapted for television by David Benioff and D. B. Weiss.
Split into simpler sentences: The season mostly covers the events of "A Clash of Kings", the second novel of the "A Song of Ice and Fire" series by George R. R. Martin, of which the series is an adaptation. The series is adapted for television by David Benioff and D. B. Weiss.