The Code Breaker is the story of Jennifer Doudna, who won the 2020 Nobel Prize in Chemistry for her development of the CRISPR technology that allows gene editing. It is also the story of genes and gene editing and women in science. Walter Isaacson is a veteran biographer. He writes in highly readable prose that is particularly welcome when it comes to writing about science, when the concepts can be difficult. He also writes it like a pacy story, where you want to know what happens next. It is little surprise that on coming out, The Code Breaker went straight to the top of the New York Times nonfiction bestseller list.