No need to use caution when lost in your imagination! The scan isn't great on this one - you may want to click on it to see it bigger + some more details.
Well, I have come to a decision about which medium I will use for my book (gouache vs. watercolours). I'm going to stick with the tried and true (w/c). I think more than anything, learning gouache to any level of mastery in a limited time is a stress I don't need to put on myself!
And I think watercolours will be just fine, thank you very much. I want to make sure I use them intensely, brightly - so I will keep having fun with this. Also experimenting with using coloured pencils for shading in this one, giving it a bit of a sketchy/hand drawn feel, which I like.