I Am Warning You by Rafal Milach is a book-quadtych dedicated to three different border walls: the American-Mexican wall (#13767), the Hungarian-Serbian-Croatian fence (I Am Warning You) and the Berlin Wall (Death Strip). Collectively, alongside a collection of essays, they present an architectural survey dedicated to propaganda and control while also collecting the experiences—the memories and scars—of borderland communities. The quadtych represents physical structures that degrade from one book to another: from the heavily fortified American wall to the Hungarian electric fence to the traces and memory imprints of the Berlin Wall. Milach photographs the walls not as monuments but as instruments—of separation, intimidation, displacement and surveillance—reading them against the human geographies they cut through. With essays by Michael Dear (on the US-Mexico border), Antje Rávic Strubel (on the legacy of the Berlin Wall) and Ziemowit Szczerek (on the post-2015 Hungarian fence), the work draws unsettling parallels across continents and decades, showing how the architecture of separation circulates, mutates and persists in contemporary Europe and the Americas.