In Algerians without Borders, Allan Christelow examines the factors that have drawn or pushed Algerians to cross borders, both literal and metaphoric. He provides an in-depth analysis of the results of these crossings: from problematic efforts to secure external support for political projects, to building interfaith dialogue and the exploration of new ideas, to the emergence of new communities. He also investigates the return of border crossers to Algeria and the challenges they face in adapting to new environments, whether negotiating alliances, engaging in dialogue, or simply seeking legal acceptance.

Christelow concludes with a discussion of the last few decades of Algerian history. He explores how Algerian intellectuals operated outside of the country's borders, spurred on by the rise of Islamism as well as by freer dialogues with Western powers, specifically Britain and the United States. The result is an alternate history of Algeria that demonstrates just how much its citizens' engagement with other societies has transformed the country.