Goosey Gander (2021) exemplifies Robert Irwin's decades-long investigation into perception itself as the true medium of artistic experience. Spanning 182.9 × 280 × 10.8 centimeters, the work operates through shadow, reflection, and color rather than conventional pigment or form, inviting the viewer to confront the instability of what they assume they are seeing. Irwin constructs conditions rather than objects, and this piece distills that philosophy with characteristic economy, producing an environment in which the boundaries between the artwork and its surroundings dissolve with each shift in ambient light and vantage point. The title carries a playful dissonance that is entirely consistent with Irwin's sensibility, a nursery-rhyme cadence set against a work of rigorous phenomenological intent. Color here is not applied but generated through the relationship between surfaces, light sources, and the space the piece inhabits, meaning the work is genuinely site-responsive and will read differently depending on its installation context. Collectors acquire not a fixed image but a set of precisely calibrated perceptual conditions that remain active and mutable over time. Offered through Sprüth Magers, Goosey Gander represents a mature statement from one of the most consequential figures associated with the Light and Space movement. Irwin's work is held in major institutional collections worldwide, and pieces from this period of his practice are increasingly scarce. For the serious collector, this is an opportunity to live with a work that does not merely occupy space but continuously transforms it.