Little Brother is a novel by Cory Doctorow, published by Tor Books. It was released on April 29, 2008. The novel is about four teenagers in San Francisco who, in the aftermath of a terrorist attack on the San Francisco–Oakland Bay Bridge and BART system, defend themselves against the Department of Homeland Security's attacks on the Bill of Rights.


Little Brother won the 2009 White Pine Award, the 2009 Prometheus Award. and the 2009 John W. Campbell Memorial Award. It also was a finalist for the Hugo Award for Best Novel. Little Brother received the Sunburst Award in the young adult category.


The New York Times says, “Little Brother isn't shy about its intent to disseminate subversive ideas to a young audience. The novel comes with two afterword essays by cryptographer and computer security specialist Bruce Schneier, and hacker Andrew "bunnie" Huang, and has a bibliography of techno-countercultural writings, from Jack Kerouac's "On the Road" to Schneier’s "Applied Cryptography."


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