Wendy Brown's other recent books include Undoing the Demos: Neoliberalism's Stealth Revolution (2015) and In the Ruins of Neoliberalism: The Rise of Anti-Democratic Politics in the West (2019). Both of these share some themes with Walled States, Waning Sovereignty, including the relationship between neoliberalism and the rise of capital and the decline of democratic values in today's world.
The Politics of Borders: Sovereignty, Security, and the Citizen after 9/11 (2018) by Matthew Longo theorizes about how changing borders in the face of things like terrorism and immigration can impact sovereignty and individual liberty.
White Borders (2021) by Reece Jones provides a deeper look into...