Not many books manage to give a decent introduction to combining being an artist and a businessman. Guigar, Kellett, Kurtz and Straub do this excellently. I bought this book because I'm writing a Master's thesis on webcomics -- and "How to make webcomics" will definitely be quoted heavily in it -- but reading this book also gave me a renewed interest in making my *own* webcomic.
The best authors for books on how to make webcomics are definitely webcomics creators who love what they do. Guigar, Kellett, Kurtz and Straub show an enthusiasm in this book that rubs off, and in a wonderful mix of creative chapters (writing, creating your characters), practical chapters (scanning your comic, making a website) and business-related chapters (making an income out of your webcomic), it becomes very clear that the authors love what they do, and that anyone who loves webcomics may one day compete with them on the webcomics arena. You learn that you have to love webcomics to make one, as they won't give you much income the first couple of years, but you also learn to not feel guilty for monetizing on your work. This is the perfect combination of a "how-to-be-creative"-book and "how-to-sell-your-art"-book.
If there is one thing I hope will change in the second edition, I wish for a more global perspective. The book is great, but many of the points stated in it aren't really that useful for non-Americans. For instance, when I make a webcomic in Norwegian, I will probably never get ten thousand readers. I could write it in English, but that would create problems with a store, since I'm still physically based in Norway and won't be able to send books and T-shirts to USA or UK without charging a lot for sending them -- probably more than my readers want to pay. And if I need to use print-on-demand, there aren't really anyone over here that can offer that, ... and so on, and so on. I hope that a future "How to make webcomics" will be able to have a chapter answering some of the additional questions that rise when creating a webcomic outside the US.
But that is nitpicking, really. This is the epitome of a five-star book.