I was given this book as part of my local library binge box. I enjoyed it. Based in 1910 London when women were considered to be possible, Daniel Pitt is filling in as assistant to a seasoned lawyer. The case involves the murder and disfigurement of the wife of Russel Graves. Russel Graves is the accused. After Graves is convicted, the team have 21 days (hence the title) to appeal the verdict. The investigation leads to many secrets and a better understanding of London society in this time. I especially liked the character of Miriam, a brilliant scientist who cannot get the appreciation deserved because she is a woman. However, her insights and knowledge help close the case. I am unsure if I will be reading more of the series but this book was well worth the time.