Freddie Williams is an illustrator with DC Comics. He is unusual in that he illustrates solely with Adobe Photoshop. He mentions in the introduction to his book, The DC Comics Guide to Digitally Drawing Comics, that he had been faced with a bit of unease by both other illustrators and some editors when he used to mention that, as he then wouldn't be considered a "real artist." Until the San Diego Comic Con, in 2005, when he met the creative director from DC, who responded that he couldn't tell the difference. He presents a number of compelling reasons why working digitally (and readers are given all of the specifics of the kind of software and hardware he uses) works better for him than by hand.
Indeed, readers interested in creating their own comics will be hard pressed to find a more specific guide to follow. The instructions include clear graphics that cover almost all of the tools in Adobe Photoshop, with additional suggestions for marketing the artist him/herself in the form of printing off one's best works that will make this a book that includes (or could perhaps convert?) established illustrators. It does assume some knowledge of comics, but will likely entice those readers who are interested in the form into branching out into creating their own. Not a bad thing at all.