The stuff between the stars: how vera rubin discovered most of the universe - sandra nickel

Nickel, Sandra: - Sandra Nickel is a former New York City lawyer who now lives with her family in Switzerland.

She is a graduate of the Vermont College of Fine Arts with a master of fine arts in writing for children and young adults.

Helena Perez Garcia is a Spanish illustrator whose work has appeared in magazines, newspapers, and books around the world.

Her clients include Penguin Random House, The Body Shop, Tate Publishing, and Readers Digest , among many others.

She currently lives and works in Madrid.