Ramiro Calle (Madrid, Spain, 1943) is a yoga teacher and an award-winning writer. He has written more than a hundred books on various topics, mostly philosophical or spiritual, but also compilations of stories and travel guides. Since 1971 he founded the Shadak yoga center, which more than half a million persons have visited. He has also taught at the Autonomous University of Madrid, and has lectured elsewhere.
Nívola Uyá is a Spanish award-winning illustrator and visual artist, with a degree in Environmental Sciences. She loves nature as much as illustration and, whenever possible, combines both worlds. She makes illustrations for books, campaigns, audiovisual, and murals, as well as illustration and creativity workshops in many corners of the world, convinced that the creative process brings out the best in people and makes us more sensitive. With a palette of luminous colors and a magical-realistic style, she likes to capture possible and optimistic worlds, that spread love and hope. She has more than a dozen illustrated albums published in English, Spanish, Catalan, Portuguese, German and Swahili, distinguished with several international awards, such as the Silver Medal at the Moonbeam Children's Book Awards for Best Illustrator, and Best Illustrated Album Award at the International Latino Book Awards and the selection Seal Chair of UNESCO for Reading.
