Kindle. Second time around with this author. Unfortunately this one doesn't add up to more than its influences, which are legion. Shamsie owns to leaning on Sophocles's Antigone by way of Seamus Heaney and Anne Carson, but is more circumspect about her wholesale adoption of the tropes of the moment. For instance Parvaiz's keen hearing and interest in recording urban soundscapes directly echoes Paul Beatty's Slumberland, and her treatment of race is far less facile, nuanced, insightful or funny than his. The bondage scene with its chains and pain seeking took on shades of gray.
Briefly the book has the son of a jihadi look for meaning by following in his father's footsteps, while his strong sisters attempt to get on with their lives, until they cannot. A Tory politican ex-Pakistan transcends his background by being tough on terror, until he too cannot. At one point a character goes on a Lysistrata-esque sex strike; another trope that was big in 2016 (cf Chiraq). Mostly it's more scenario than novel.
Shamsie traverses a similar mix of cities as Mohsin Hamid did in Exit, West: London, Raqqa, Amherst, Karachi. Her women are powerful, largely not by asserting themselves freely so much as being thrust into demanding situations, and she generally inflates these characters well enough. Conversely the males are stereotypes: the power seeker in need of comeuppance; a fatherless boy, easily led; an effeminate son, also easily led; the nervous shopkeeper dealing with ISIS, the ISIS muscle, totally soulless: all deracinated, instruments all.
Many authors have tried to map the road to terror: Salman Rushdie, Mohsin Hamid, Pankaj Mishra, Karan Mahajan, Jarett Kobek immediately spring to mind. At this point it would have been more interesting to treat the guys with power (Farooq, for instance) or the men who have constructed these organizations over decades, and the women who think there's something in ISIS for them. Shamsie touches on much of this but doesn't get to the heart of it; for that we'll need to wait for a modern-day George Orwell.
Dwight Garner saw more in it than I did, though his review runs to little more than summary, accounting for source materials and picking faults. The quote about the cold fish elides Shamsie's patronising explanation of it being about a cold fish. Peter Ho Davies also reviewed it more critically for the New York Times. He points to even more source material.