Highlights of the seventh volume of Signal include:

Philadelphia Printworks: Maryam Pugh discusses the legacy and future of Black political art with John Morrison

The Vinyl Records of Victor Jara: The world-wide impact of the nueva canción bard documented by Josh MacPhee

Spectacular Commodities: Mehdi el Hajoui explores the objects of the Situationist International

The Left Independistas: A fifty year retrospective of the graphics of the Catalan independence movement by Jordi Padró

Dario and Maxi: Natalia Revale documents the transformation of a Buenos Aires metro station

We Will Break Open the Doors That Obscure the Sun: Erik Buelinckx uncovers the graphic work of the anarchist Belgian Expressionist Albert Daenens

Giving Voice to the Voiceless: Bill Berkowitz interviews California printer and poster maker Malaquías Montoya

Highlights of the eighth volume of Signal include:

Writing for the Revolution: Publishing and Designing Black Power Books by Andrew Fearnley

Hope in the Midst of Apathy: Liberation magazine and the Covers of Vera Williams by Alec Dunn

Most of My Heroes: Stamps in Memory of Anti-Sikh Violence by Vijay S. Jodha & S. Ravi

Our Code of Morals Is Our Revolution: Agit Prop Travel Documents of the Popular Front for the Liberation of Palestine

Slave Rebellion Reenactment: An Interview with Dread Scott by Josh MacPhee