the books weren't necessary to read, they had arrows to the next planet at the top of each page
Is that what those big red arrows at the top of the books were for?? lmao
To me they were necessary, because the 3rd planet in each book wasn't coloured, and the colour picture clues at the bottom of each page just weren't clear enough tbh... I would have classed the 3rd planet as white, not grey. And the 'green' planet wasn't actually just green, was it?