Resources: 

Watercolor Painting book: https://www.amazon.com/Watercolor-Painting-Comprehensive-Approach-Mastering/dp/0823006735/ref=sr_1_1?ie=UTF8&qid=1494440393&sr=8-1&keywords=tom+hoffman

Needlepoint Brush: http://www.alvarocastagnet.net/2012/02/needle-point-brush-8/

Alvaro Castagnet's book: http://www.alvarocastagnet.net/

WW Email Sign-up: http://prints.aquilawatercolor.com/watercolor-wednesdays/