In 2014 the peaceful city of Raqqa in northern Syria was proclaimed the capital of the Islamic State group's so-called caliphate. For nearly four years, residents there lived under a reign of terror. A new book out in French brings their stories to the world. "L'Asphyxie : Raqqa, chronique d’une apocalypse" ("Asphyxiation: Raqqa, Chronicle of an Apocalypse") is co-written by French reporter Céline Martelet and Syrian journalist Hussam Hammoud. Hammoud has just arrived in France where he has been granted asylum after an initial rejection by French authorities. The two authors joined us for Perspective.

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