Ferdinand Kriwet contributed an introductory essay, "Decomposition of the Literary Unit: Notes on Visually Perceptible Literature" that traced the historical antecedents of concrete and poetry. This is followed by an illustrated section on his own linguistic and compositional techniques involving circular concrete poems, "Rundsheiben." "Walk Talk," a vinyl, floor covering, a portion of which was given to the Sackners by Kriwet is depicted in the book.Kriwet defines his term "Sehtext" as a solution to the problem of visually perceptible literature. It is the tension between the physical act of seeing and the intellectual one of reading. Seeing is a process of perception; reading is the reaction to it. -- Source of annotation: Marvin or Ruth Sackner.