Complex sentence: Drover's Secret Life is the fifty-third book in the Hank the Cowdog series by John R. Erickson, and the only book in the series not written in Hank's voice.
Split into simpler sentences: Drover's Secret Life is the fifty-third book in the Hank the Cowdog series by John R. Erickson. It is the only book in the series not written in Hank's voice.