In his book, Misha Angist takes you through his experience as the fourth subject in the Personal Genome Project, George Church’s ambitious plan to sequence the entire genomic catalog: every participant’s twenty thousand–plus genes and the rest of his or her six billion base pairs. He shares his thought process on deciding to be a participant and contemplates the advantages and disadvantages. This journey takes you through Angist discovering his variants and what disease he was at a higher risk for.