[rdtsc]

I think it's more about the visual style overall with or without text. It's not just DK book but Designs for American Museum of Natural History and other example. Software packaging, especially from Microsoft had it.

The text is often a serif font, there is often a white background, and a heavy reliance of clip art. At least for me, it immediately clicked and I recognized it. I just had no idea it had a name and it's identified as a unified "style".