"The Rooftop Garden is a novel about Nabila, a researcher who studies seaweed in warming oceans, and her childhood friend Matthew. Now both in their twenties, Matthew has disappeared from his Toronto home, and Nabila travels to Berlin to find him and try to bring him back. The story is interspersed with scenes from their childhood, when Nabila, obsessed with how the climate crisis will cause oceans to rise, created an elaborate imaginary world where...