Her latest is The power trip, and she has sold well over 500 million copies of her books.
The makeup artist shook her head slowly, always the sign of a power trip going on.
And in my experience of writing about campaigns, that power trip does exaggerate their narcissism.
A show of personal power, esp of a blatant sort: the classic Latin American dictator's power trip
[mid-1960s+; based on the narcotics sense of trip]