I'm not sure. Possibly both? Just took a look over my bookshelf, but they haven't made it with me through moves. I do still have Incredible Cross-Sections. Th

I'm not sure. Possibly both? Just took a look over my bookshelf, but they haven't made it with me through moves. I do still have Incredible Cross-Sections. That was another of my favorites to flip through. It looks like there are reprints and new versions. Would definitely recommend for kids. https://www.amazon.com/Stephen-Biestys-Incredible-Cross-Sections-Richard/dp/0679814116 https://www.amazon.com/Stephen-Biestys-Incredible-Cross-Sect...