The Republic of Memory by Mahmud El Sayed (Gollancz, £22) On a gigantic spaceship halfway through its 400-year voyage to a new world, hundreds of Earth colonists are kept in frozen stasis by the ever-increasing maintenance crew. Not all the crew are happy with the way their lives are harshly controlled by the Administration, and peaceful protests have inspired whispers of revolution. The multicultural city-ship has two official languages: Inglez and Arabek. Iskander Ezz is a translator between Crew and Administration, aware that “when you speak a different language, you become another person”. Damietta, his younger cousin, finds the unofficial Nupol better for communicating with her fellow protesters. Nupol, an argot made up of many “dead Earth” languages, is used throughout the book by several viewpoint characters, adding a distinctive flavour to a speculative fiction its author calls Arabfuturism. Partly inspired by the historic Arab spring, this is a thoughtful, exciting space opera.…