My publisher (Random House Australia) has produced some official Chasing the Valley wallpapers to download and use on your devices.
1. Click your chosen wallpaper to view the full image.
2. Right-click and save the image to your computer.
3. Install the image as your wallpaper (the details of this step will depend upon your device).
Hope you guys enjoy them!
Computer Wallpapers:
Phone Wallpapers:
Tablet Wallpapers:
Skye Melki-Wegner 
Great graphics: love the bi- planes! I have it on my iPad and laptop.