Wow! This is such a great collection of drawings! :) I love colored pencils, but I am always scared to use them except when coloring art that someone else has drawn.
I really like the details you added in the shack - the tree out the window is such a nice touch. Also, the effect you used for ghost!Snape is really cool. The naughty pic is lovely. I have to admit I'm a bit obsessed with both of their hair and Harry's face for some reason. It's his eyelashes and his nose and jawline. I just keep staring. :D
I love how you've told a full story with your pictures. Great job!!