Dan Margulis is a best selling author of books on Adobe Photoshop. His most popular books are probably "Professional Photoshop" and" Photoshop LAB Color: The Canyon Conundrum and Other Adventures in the Most Powerful Colorspace" about the usage of L*a*b* in color correction. He is also a featured columnist for "Electronic Publishing" magazine, and "Photoshop User" magazine. Wikipedia
The definitive Wikipedia entry for Dan Margulis. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Dan_Margulis
The class was overhauled at the start of 2008 to accommodate the new "Picture Postcard Workflow" introduced by Dan Margulis at Photoshop World in 2007. Those having previously taken the course would find substantial new content. The scheduled topics are www.ledet.com/margulis