Was browsing Amazon the other day (can't resist books!) when I came across an interesting art book. It hasn't been published yet but I've pre-ordered it as it looks good. Looked up Claire Harrigan on the web, couldn't find a site as such but found her paintings on some gallery sites. Was very impressed so I'm looking forward to the book.
http://www.amazon.co.uk/Abstract-Techniques-Colour-Painting-Harrigan/dp/0713490551/ref=sr_1_1/202-5001310-9202269?ie=UTF8&s=books&qid=1178189875&sr=1-1