Nansubuga was born in the United States to Ugandan parents and works in international development in East and Southern Africa. Her debut picture book 'Sleep Well, Siba and Saba' was voted a Kirkus Best Picture Book of the Year.

For one little Ugandan boy, no wish is too big. First he dreams of reaching the stars and then of riding a supernova straight to Mars. But on a rainy day at his grandfather's house, he is brought down to earth with a bump. Do adventures only happen in galaxies far away or can he find magic a little closer to home?