"Original and timely, Common Circuits makes visible alternatives to the mainstream, neoliberal tech industry, spotlighting how hackerspaces are organized around knowledge exchange, friendship, and mutual aid. With a nuanced assessment of hacker politics, Murillo brings into focus fascinating and overlooked facets of computing cultures and history." Gabriella Coleman, Harvard University "In paired chapters on places and peoplemulti-locale pilgrimage sites and personal trajectories as social hieroglyphsMurillo introduces us to the significance of hacker spaces, including Noisebridge in San Francisco, Chaihuo in Shenzhen, and Tokyo Hacker Space. They are driven, respectively, to create: radical open communities; networks of gift-commodity-gift exchange; and pro-data neutrality of open science collecting and visualizing. Murillo's beautifully written book provides important material for thinking about how to open rather than close the creative commons, and the history of the global circuits and fluorescence of hacker and maker spaces." Michael M. J. Fischer, Massachusetts Institute of Technology