Thought I'd mention a couple of art technique books which I like. The first one by Claire Harrigan I have mentioned before in a previous posting 'Abstract and Colour Techniques in Painting'. I can't find a website for this artist but you can find examples of her work on the web. The book is illustrated with numerous colour illustrations of her work and gives a good insight into moving towards abstract and semi-abstract art and the use of colour. Being a 'colour junkie' I love looking through this book.
Another book which came my way recently is 'Collins 30 Minute Acrylics' by Soraya French. She is a professional artist and was the 2005 winner of the SAA Artist of the Year award. This book is a little gem which covers the basics as well as providing inspiration in small bites. It is also full of lots of colourful illustrations to whet the appetite. Her website is - http://sorayafrench.com/wordpress/