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

Black and red marker on paper

Graphite on paper

Graphite on paper

Watercolor on paper

Graphite on cream wove paper

Colored marker on paper

Black and colored crayons on off-white wove paper mounted to cream wove paper

Colored marker on paper

Blue marker and black pen on paper

Colored marker and blue pen on paper

Graphite on paper

Colored marker and opaque watercolor on paper