A Father Revealed. Avant-Garde Jazz. And Nanobot Murder Suspects.Private investigator Neil Ames returns to the smoke-infused Pacific Northwest from a hazardous investigation in Kazakhstan only to find his trusted confidante, Octavia Clarke, shattered. Her mother has died.and as she braces herself for the funeral in New Orleans, a shocking email drops a bombshell—Octavia’s biological father is none other than Bastien Beaulieu, a legendary jazz composer and nanotech genius. But more disturbing—Bastien has been brutally murdered.Determined to uncover the truth about her hidden legacy, Neil and Octavia head to Montreal, for the reading of Bastien’s will. Octavia finds herself in a chilling situation when she inherits Bastien's house, his beloved trombone, a resentful half-sister, and a revolutionary but ethically dubious research project that entangles her in a lethal conspiracy.As Neil unravels Bastien’s secret work in DNA origami and nanotechnology, he realizes they’re up against forces far darker than they imagined. Octavia is in grave danger as a ruthless assassin, working for a shadowy organization, is hot on her heels, willing to do whatever it takes to obtain Bastien's findings.The deeper Neil probes into Bastien Beaulieu’s murder, the more he realizes they’ve stumbled into a world of unspeakable darkness and betrayal. Bastien’s ethically precarious research could trigger global genocide, and Neil must race against time to stop a ruthless killer from claiming both the research—and Octavia’s life.The Four-Bar Progression is Book 2 of the Neil Ames, PI Mystery Series