If you're tempted to buy the popular e-book reader from Amazon . . . but want to try it out first and perhaps compare it to Barnes & Noble's Nook . . . Target is the place to go: It's the only national brick-and-mortar retailer to carry it. The brand new Kindle 3, which is smaller and lighter than previous models, will sell for $189 at Target, the same price as at Amazon.com. "Look someone up in the store who knows how to work the device, so you can get a feel for it," suggests James McQuivey, a media technology research analyst at Forrester Research. If you've never seen someone use it, it can be a little bit tricky to figure out on your own.