Mighty Jack is that rare middle-grade graphic novel that's genuinely imaginative, emotionally grounded, and fun to look at. Ben Hatke knows how to build a world—his backyard jungle is weird and wonderful, full of onion babies and carnivorous pumpkins that feel both silly and slightly menacing.
The sibling dynamic is the real heart here. Jack's summer caretaking role is portrayed with nuance: it's boring, it's a lot, and then it becomes the catalyst for the wildest adventure. Maddy's autism is handled with care—she's not a plot device, and her moment of agency (demanding the seed trade) is what launches everything. That's good representation.
The fantasy violence is standard adventure fare, and the 'scary' elements are more Tim Burton-lite than nightmare fuel. This is a solid pick for kids who need a visual hook to stay engaged with reading, or who just love a good 'what if the garden came alive' story. It's entertaining, it's got heart, and it doesn't overstay its welcome.