Leo is completely prepared to protect his new baby sister, Luna, and teach her everything he knows. There's just one small problem: being a big brother is a lot different from what he expected Packed with laugh-out-loud moments and a gentle heart, Big Brother, Big Love explores the chaotic, sweet, and patient journey of a little boy with a dramatic flair and an even bigger heart. With one tiny sister and one giant heart, Leo knew their best-friend story was ready to start.