Already dated, and the business model is not realistic
Customer Rating: 
I'd still buy this, but be warned: the business model is unprofessional and unreliable. This may be why two authors of four carry full time jobs. The advice about what kind of comic to pursue does not match with what kinds of comics are successful, probably because these are black and white strip artists with a long record of newspaper rejection.
An alternate business model would not rely on Kellett's questionable anecdotal data and would involve real research and footnotes. For all the cheering about a career in webcomics, the authors become defensive when asked to substantiate claims, and seem to feel the fact that a career in webcomics is possible is proof enough. I am of the opinion that any book called "How to Make Webcomics" should explain exactly that, including the essential business portion, which is shaky and lacking key data.
The fact that the authors are quite willing to hurl written insults at web reviewers who are merely lukewarm suggests a lack of confidence in their own work. Cartoonists who question the business assumptions, including those with accomplished careers, are called "bitter failures" on the web by the authors. "Not everyone can be a cartoonist," preaches co-author Kurtz ignorantly, to a cartoonist whose circulation actually appears to exceed most of the four authors' titles. These are the most pugnacious authors since Norman Mailer was throwing punches at cocktail parties.
My message to shoppers is there is value, but the pitch about becoming a cartoonist is unrealistically hyped, using greatly exaggerated numbers and hype to excite people into opening their wallets. Webcartooning is one of the riskiest career choices one can make, and competitors number in the thousands. The authors claim frequent cautions to readers, but these vague qualifications are outnumbered by cheerleading and "on to the next step" formulations that don't match reality.
It's a shame these authors are so defensive. Simply absorbing comments and recording the best for volume 2 would leave their micro-celebrity status untarnished, but they seem to come from a background where truth is devalued and shouting down critics is OK. It shows in the book.
A Comic Artist's Must-Have
Customer Rating: There are a handful of making your own comics and scads of books on drawing them, but there's not much on making a living off them, particularly with webcomics. "How to Make Webcomics" spends very little time on the stuff that's been covered elsewhere and does a great job filling the niche that other books have missed.
Again this book focuses not on "10% inspiration" fine art aspect of comics that there are already have shelves worth of books about, but the "90% perspiration" topics that are the difference between a talented artist and a successful talented one. Topics like maintaining a good update schedule, proper site design, self promotion, merchandising, dealing with supporters, working comic conventions, and other aspects of building a fan base that leads to a lucrative webcomics career.
This is also one of the best examples of a multi-author book I've ever seen. Most books written by more than one person have no difference in who's "speaking" or have clunky transitions between authors. In this book, you always know who's talking and each author is established as a unique, experienced voice on the matter and will actually butt it on another person's chapter to offer a different opinion on a subject.
The lessons passed on in "How to Make Webcomics" apply beyond online funny pages and are required reading for any artist looking do more for themselves on the internet.
And if nothing else there's plenty of funny comic strips throughout to keep you entertained.
