The lithographs of Album 21 look like fresh and exuberant crayon drawings by a capricious child. Each image gives an immediate sense of Mirós hand moving over the surface of the paper. The strength of the series lies in how fluidly Miró unifies all 21 images in a whimsical and playful style that is his alone.

The vibrant reds, yellows, greens and blues hint at the powerful beauty of the Spanish countryside and relate to a political poem by Mirós friend Carlos Franqui, an exiled Cuban intellectual. Included in the Album 21 portfolio, the poem describes a beautiful culture destroyed by war.

The poem ends with a call to action, a call answered by Miró, who used his art to fight oppression and promote political freedom, for example in The Constellations and in the fundraising poster Aidez L'Espagne. Album 21 illustrates mirós dedication to promoting young writers, especially those who shared his political convictions.