Complex sentence: The authors of the book describe, as part of a five phase model of how a typical workplace psychopath climbs to and maintains power, that in phase one (entry) the psychopath will use highly developed social skills and charm to obtain employment into an organisation.
Split into simpler sentences: The authors of the book describe a five phase model of how a typical workplace psychopath climbs to and maintains power. In phase phase one (entry), the psychopath will use highly developed social skills and charm to obtain employment into an organisation.