"height of his/her powers"

[Johnny Ostentatious]

I've come to realize that whenever a book jacket describes the author as "being at the height of his (or her) storytelling powers" it's the publisher's way of saying: "This book sucks but this writer wrote a lot of good novels in the past so we had to buck up a huge advance, and now that the author is resting on their laurels we're praying this book at least breaks even." Oh, and another piece of jacket copy to keep an eye for is when they say the writer is "at the top of their game." Beware and be warned. . . .