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

Graphite on paper

Blue marker and black pen on paper

Colored crayons ; black crayon on paper

Graphite on cream wove paper, squared

Opaque watercolor on paper

Colored marker on paper

Graphite and colored pencil on paper

Graphite on paper

Colored marker on paper

Colored marker on paper

Black marker on paper

Colored marker on paper