Glenn Ligon’s "Sit So Your Back Isn’t Against The Door" reunites his Coloring Book paintings for the first time in 25 years. Large canvases translate children’s coloring of Afrocentric pages—Frederick Douglass, Harriet Tubman, Malcolm X—into exuberant marks. A new 22-part work, "Black Panther Coloring Book #1", masks images behind taped rectangles, leaving captions, traces, and fingerprints.