An intimate exploration of motherhood, Linea Nigra approaches the worries and joys of childbearing from a diverse range of inspirations and traditions, from Louise Bourgeois to Ursula K. Le Guin to the indigenous Nahua model Luz Jiménez. Part memoir and part manifesto, Barrera's singular insights, delivered in candid prose, clarify motherhood while also cherishing the mysteries of the body.

Writing through her first pregnancy, birthing, breastfeeding, and young motherhood, Barrera embraces the subject fully, making lucid connections between maternity, earthquakes, lunar eclipses, and creative labor. Inspired by the author's own mother's painting practice, Linea Nigra concludes with an impassioned call: childbearing is art, and art is childbearing.