Complex sentence: Campbell's debut novel was "Scar Night", the first of the "Deepgate Codex" trilogy, followed by "Iron Angel" in 2008, and "God of Clocks" in 2009.
Split into simpler sentences: Campbell's debut novel was "Scar Night", the first of the "Deepgate Codex" trilogy. The second novel of the trilogy is "Iron Angel", and the third and final novel of series, "God of Clocks", was published in 2009.