Selling rights in the context of children's books involves the legal permissions given to authors, agents, or publishers to sell and distribute a book in various formats and markets. This can include rights for print editions, digital formats, translation into different languages, or adaptations into other media like audiobooks or films. Understanding selling rights is crucial for authors, as it affects income potential and control over their work. Each type of right can be sold separately, allowing for strategic partnerships and broader reach in the market.