In the midst of high global mobility due to war and political-economic instability, Odisea del norte (1999) by Salvadoran author Mario Bencastro remains an illuminating snapshot of the situation of undocumented migrants. In an examination of this canonical work, Karly Follis explores the theme of invisibility. She focuses on the biopolitical subjugation, epistemic discrimination and discursive silence faced by undocumented migrants. On the occasion of the 25th anniversary of the book's publication, this analysis sheds light on the internal thematic nuances of the characters' invisibility as well as the significance of the novel itself as an act of resistance and visualization.