Jakob lives in a “bubble” to protect his health. But it doesn’t stop the boy from enjoying imagined escapades with an oversized version of his “best buddy Buvo,” a red stuffed toy. For instance, they visit a place called “puddle land on a rainbow unicorn,” and when Jakob’s grandparents call, he imagines the phone “is a super-powerful teleporter and magnifying glass.” Throughout the tale, Mom reminds Jakob to wash his hands to avoid germs. When Jakob feels sick and scared, Dad reminds him that he’s “a fighter.” Buvo frets when Jakob leaves to visit a doctor. But Jakob explains that “Dr. Mustache will fix me” and returns home feeling better and ready to play. Tucked in bed, Jakob plans his next mission. He tells his parents: “I am going to camp on the moon….I’ll dream about the park, new friends, and castles made of mud.” Inspired by the real-life Jakob Kamil Guziak, who was born “with no immune system to fight infections or colds,” Fernández de Soto AbdulRahin’s story offers a heartening portrayal of a child’s perseverance. Youngsters with their own health limitations will particularly relish Jakob’s amusing, inventive explorations. Mañozca’s lively, hand-drawn illustrations depict fanciful, sometimes quirky scenes of Jakob’s exploits, as when the White hero battles a scary, cheese-filled shark surrounded by emotive broccoli florets at lunchtime.