Emily Carroll is a recent discovery for me and all I know about her has come from her website emcarroll.com but she is a wonderful example of the generosity and creativity of online comics makers.
I recommend that you visit the comics page of her website. All of her stories are good but His Face all Red is my favourite. It is beautifully designed and every time I view it I am struck by her skill with character dynamics and facial expressions. I won't speak about the story because I wouldn't want to spoil it for you but prepare yourself to be spooked.