Duped!

Let me first say that I love my Kindle.  I love the fact that I can get a free sample of a book I'm thinking of purchasing before I actually purchase it.  However, lately, I've felt like I've been duped by the samples of a few books I've recently purchased.  The sample is so good that I jump to purchase the entire book only to watch it fall apart.  It's frustrating to have a book start with so much potential and then turn into page after page of ridiculousness and tomfoolery.  I feel like I've been suckered.  It's amazing how some books start so wonderfully and fall off the cliff soon after.