Roald Dahl's "Ghost Stories" copy

Here is the front cover of a book by Roald Dahl called "Ghost Stories" which i have decided to copy.

Here are the photos of my progress when drawing this front cover out by hand. To make the design as detailed as possible I used a light-pad and used a pencil to draw the most dominant parts of the image, especially the large branches, the birds, the moon and the text. After this I used a pencil to add in the less dominant branches and other parts of the trees that I didn't trace or that I wanted to add in, which meant my final drawing was slightly more detailed than the image I was drawing from. Then, for the thicker parts of the tree, I used a black Sharpie to ensure there was definite black colour and white colour in the image, much like Threshold would do on Photoshop. For the thinner branches on the tree, the moon and thinner parts of text I used a fineliner to go over them, creating the same effect as the sharpie did. I also used a pencil and then fineliner with a ruler to add a border around the outside of the drawing to make it look like a conventional book cover, this also brings the whole design together.