Stross states that his inspiration for the spy in these novels is closer to the out-of-place bureaucrats of Len Deighton than to the James Bond model. He also mentions that when he began writing the series in 1999, he chose as villains "an obscure but fanatical and unpleasant gang who might, conceivably, be planning an atrocity on American soil"; but that by the time the novel was to be published in late 2001, Al-Qaeda was no longer obscure, so he chose a different group to use in the novella.