If you’ve seen Jordan Crane’s elegant webcomics hub What Things Do — or better still, if you’re one of the lucky few who have a copy of his hand-silkscreened, die-cut, three-books-in-one anthology NON #5 — you know that the cartoonist behind Uptight and The Clouds Above is one of comics’ best designers. But I think that with Keep Our Secrets, his new comics-style children’s book for McSweeney’s kids’ imprint McMullens, the man has truly outdone himself. This sucker is partially printed in heat-sensitive, color-changing black ink that disappears when touched to reveal a picture hidden underneath. Check it out in the video above, as two adorable tykes help demonstrate. If I were a little kid, I think being able to touch a book and suddenly see hidden stuff appear — like an accordion stuffed with cats, say, or a guy with banana hands under his gloves — would be something close to magic.