Untitled (front endpaper, left page); Untitled (Piene signature, right page)

Gray marker on paper

Graphite on paper

Ink on paper

Graphite on paper

Graphite on paper ; graphite and aqua crayon on paper

Graphite with pink and aqua crayon on paper

Black marker and adhesive on paper

Black marker on paper

Blue marker and white opaque watercolor on paper

Graphite on envelope

Colored marker on paper

Paper