Black Book contains 17 reproductions of Wool’s iconic single-word text images. It clearly reflects Wool’s meticulous design approach. Moreover, it is regarded as a document that reshaped the visual and conceptual nature of contemporary American art. On the other hand, Black Book is also highly significant as an integrated conceptual artwork that reveals the development and origins of the artist’s visual ideology. Working with industrial letter stencils in the 1980s, Wool transfers words composed of capital letters directly onto the canvas surface. In this context, broken word fragments and bold typographic forms with variable spacing, whose legibility is debated, transform into a visual field expressing a visual language that was still surprisingly new in 1989. It also creates a comprehensive narrative about Wool’s early conceptual research. With its fragmented structures, it clearly reveals the instability of language and the distance between reading and seeing. It seeks to show that words, when freed from their syntactic obligations, can behave like images. Thus, the book, which carries a text-based approach into a sharper visual space, stands out as one of the most important artist publications of the last half-century with its measured seriousness and conceptual clarity.