Welcome to Dictionopolis
I’m still impressed by rainbows, and this despite knowing about light, and refraction, and the unlikelihood of the existence of pots of gold. I see a rainbow and my heart soars. And for me, if a rainbow ever fell to earth and became a book it would be The Phantom Tollbooth (1961) by Norton Juster. It is a thing of light, and wonder, and beauty.