"Osha Defeats the Dark Shadows" Will the Purple Monster Spray chase the Monsters away? Children can be plagued with nightmares because they think they see things in the dark that are not really there. But to them, they are very vivid and scary. This book does not contain any monsters, but Osha perceives the dark shadows as monsters. Osha's mommy empowers Osha to face her fears by using the Purple Monster Spray. The real recipe is included.