The key is the colors not the shapes as far as I can tell, as the starter books are all that orange/yellow color
So the YA novels appear to just be the Tiffany Aching series.
The red ones are also labeled “Science Novels,” both in the legend, and as the title of the series attached to the arrow pointing at the first of the series, which isn’t orange, so I guess that the order isn’t as important with those books?
The key is the colors not the shapes as far as I can tell, as the starter books are all that orange/yellow color
So the YA novels appear to just be the Tiffany Aching series.
The red ones are also labeled “Science Novels,” both in the legend, and as the title of the series attached to the arrow pointing at the first of the series, which isn’t orange, so I guess that the order isn’t as important with those books?