Greg did a great job of explaining the fundamentals to create an effective and usable illustration piece. If you are looking for something inspiring, which sheds an enlightenment on creativity and aesthetics, and delves into the innermost of the artists' minds, then this book might not be the one. The book, instead, is very straightforward, like an aggregation of must and must-not formulas for illustrators and to-be illustrators. The author introduced important factors when creating an illustration, including concept, choice of medium, composition, style, and styling. Working as an illustrator for a wide range of clients for almost thirty years, Greg also shares his considerable advise on working with art directors and maintaining a professional attitude and performance. Another plus is that the book features not just his works but also many other illustrators', so more learning!
The only reason that I held off reading his book in the first place was that I'm completely not into his style. Most of his characters are very grotesque and spooky, as if they are walking out of a horror movie. Actually, that's not far from the truth. He draws his inspiration from legendary serial killers, criminals, corpses, Dracula, and many more as you can imagine. Even his caricatures of celebrities such as Miley Cyrus or Michael Jackson look quite scary, as if their skin were made of strands of meat. Yet his illustrations are undeniably worth studying. And tbh, what I like most about his book, is his voice. Humble, satirical, and encouraging.