With Only Human (hardcover, Kindle), writer Sylvain Neuvel is bringing to a close The Themis Files, the trilogy of epistolary sci-fi novels about giant alien robots buried beneath the Earth that he started with 2016’s Sleeping Giants and continued with 2017’s Waking Gods. But in the following email interview about this final chapter, he reveals that these books would’ve been very different if his kid had a say in their plotting.