PrairieSeasons wrote:
How much time do you have, and is your objective to learn all there is to know on layers and masks or to learn enough to complete a specific project?
On layers, I would highly recommend Matt Kloskowski's book called Layers. Both as a tutorial and an ongoing reference guide.
I completely agree with PrairieSeasons. I considered myself proficient in using Layers but I still learned a lot from Matt's book.