First of all, this short guide is undoubtedly worth the $2, because it will save you at least that much in your wedding planning. (I'll venture a guess that you'll get your investment back a thousandfold, but I suppose that depends on what advice you choose to take and what you went in knowing already.)
But this is really about more than the money. It's a gentle reminder that the purpose of having a wedding is not to show off, to have everything match, or to throw the biggest party of your lives. The point is to celebrate your union and declare your commitment. The book's mantra is that "the wedding is not important." It's more for your family and friends than for you, and you'll enjoy it much more if you share it only with the most important people in your lives.
The main cost-saving measure, after cutting down your guest list, is avoiding a sit-down dinner. There isn't a clear outline for making the wedding cost no more than $1000 - that's almost impossible without finding free venues for the reception and ceremony - but you're advised to set a budget, based on what elements matter the most.
If a big, traditional wedding is all you've ever wanted (one that costs you an arm and a leg, probably, too), I recommend reading I Do But I Don't: Why the Way We Marry Matters
, which chronicles the evolution of wedding traditions and the problems they can cause for modern brides. If you want to read about real, low-cost weddings with budget breakdowns, check out Plan the Perfect Wedding on a Small Budget