His work is often melancholy, moody, and full of misfits and fantastical images. My favorite book is The Red Tree, which is a day in the life story about a girl with red hair who is having a bad day. I don't want to say too much about it, other than if you do pick it up, stick with it to the end - it's beautiful!
Here's my favorite illustration from The Red Tree.
The text for this page is 'Sometimes you just don't know what you are meant to do or who you are meant to be.'