I don’t recall reading any other books by Anne Perry, who died April 2023, aged 84. Heart attack.
Twenty-one Days (2018) is the first book in the Daniel Pitt series.
Not bad. Historical fiction.
Too slow for me. Mostly talk. Little action.
But the mystery of the murder kept me interested.
Almost literally yanked out of the courtroom where he’s defending dicey private inquiry agent Roman Blackwell on a charge of homicide, Daniel Pitt, who’s been a junior barrister for only a year, is tapped to assist his distinguished colleague Toby Kitteridge in the much higher-profile defense of Russell Graves, a tell-all biographer charged with bashing his wife, Ebony, to death in her bedroom and setting her head on fire.
The case is already winding down when Daniel steps into the Old Bailey, and his emotional last-minute questions aren’t enough to save Graves from a guilty verdict.
But Marcus fford Croft, Daniel’s head of chambers, doesn’t intend to let that verdict stand. He demands that Kitteridge and Daniel get it reversed …
Kirkus

Note:
In 1994, it became public knowledge that Perry had been convicted for murder as a teenager while living in Christchurch, New Zealand. In 1954, at the age of fifteen, she and her 16-year-old friend Pauline Parker murdered Parker’s mother, Honorah Rieper. After serving a five-year sentence for the murder, she changed her name and returned to the United Kingdom.