The title doesn't really represent the author's approach to running a business; it is probably a ploy to get teens to pluck it off the shelf and crack open the pages. To be sure, there is nothing quick about starting up your own business, if you want it to survive. Hopefully these teens have a parent or two teaching them this principle along the way.
There is some very useful content regarding the set up of a business (bookkeeping, job ideas, steps to take, etc). However, this book gives some of the scariest investment advice to teenagers I've ever heard. Bielagus describes mutual funds and Roth IRAs, recommending both for these young entrepreneurs to invest in. Kudos, props, right on the money there. What Bielagus says next is terrifying. He doesn't describe the power and beauty of compound interest for the long term. These kids could be millionaires at retirement if they were to park just a fraction of their money in these investments slowly and steadily because they're so young. But he doesn't utter a peep about this and rather let's them in on what they are allowed to withdraw early out of a Roth IRA in case they want to, say, drop everything and go on a road trip with some buddies.
Nor does he ever mention the "C" word: College. I agree with his "think outside the box" ideas of starting a business young, but what a great way to pay for college! His dependence on debt as a tool in business, personal and education, instead of saving and paying in cash goes against everything I believe when it comes to handling money wisely.