Edge of the Known World is a speculative fiction love and adventure story set in a realistic near future, with underlying themes about family, privacy and the onrush of genetic screening. Alexandra Tashen is a brilliant student, adoring daughter, merry wit, and exuberant prankster. She is also hiding in the open. After a blissful childhood on a Texas ranch, Alex learns the truth: She is a refusé from a brutal regime, smuggled into the Allied Nations as an infant. Everyone from her birthplace carries a harmless but detectable bit of viral DNA from a regional vaccine. If detected by the rapid genetic testing now standard at security ID screens, Alex will be returned to the Federation and a likely death. Her adoptive father developed a gene therapy to mask her g-marker, but it is not fully effective. Every g-screen presents a nerve-racking one-in-ten chance of getting caught. When her father goes missing, Alex abandons her cloistered academic life in San Francisco for a globe-trotting Commission in a desperate race to warn him of a trap. As Alex dodges g-screens on her precarious and often-hilarious adventure, a love triangle develops between her and two men: Eric Burton, a commanding and disgraced intelligence officer, and his sworn brother, Strav Beki, a charismatic and dangerously unhinged diplomat. Betrayals mount and secrets unravel, building to the most confounding choices that people can face—choices between love, family loyalty, and moral obligation.