Book excerpt: From Antarctica and the deserts of the US-Mexico border, to a Siberian whale-killing station and the alleyways of Taipei, these dispatches describe a world in perpetual motion (even when it is 'locked-down'). To travel, we are reminded, is to embrace the experience of being a stranger - to acknowledge that one person''s frontier is another's home. Granta 157 is guest-edited by award-winning travel writer William Atkins. It features: Jason Allen-Paisant remembers the trees of his childhood Jamaica from his home in Leeds Carlos Manuel lvarez navigates Cuba's customs system, translated by Frank Wynne Eliane Brum travels from her home in the Brazilian Amazon to Antarctica in the era of climate crisis, translated by Diane Grosklaus Whitty Francisco Cant and Javier Zamora: a former border guard travels to the US-Mexico border with a former undocumented migrant who crossed the border as a child Jennifer Croft's richly illustrated essay on postcards and graffiti, inspired by Los Angeles Bathsheba Demuth visits a whale-hunting station on the Bering Strait, Russia Sinad Gleeson visits Brazil with Clarice Lispector Kate Harris with the Tlingit people of the Taku River basin, on the border of British Columbia and Alaska Artist Roni Horn on Iceland Emmanuel Iduma returns to Lagos in his late father's footsteps, Nigeria Kapka Kassabova among the gatherers of the ancient Mesta River, Bulgaria Taran Khan with Afghan migrants in Germany and Kabul Jessica J. Lee in the alleyways of Taipei, Taiwan, in search of her mother's home Ben Mauk among the volcanoes of Duterte's Philippines Pascale Petit tracks tigers in Paris and India Photographer James Tylor on the legacy of whaling in Indigenous South Australia, introduced by Dominic Guerrera