More trouble in Oprah-author land! The talk show host's new bestselling BFF, Jessica Seinfeld, is being questioned over her guru guide on healthy eating for kids,Deceptively Delicious. Today's New York Times and Wall Street Journal report that Ms. Seinfeld's book bears an uncanny resemblance to a cookbook already out on the market, The Sneaky Chef. Sneaky Chef author Missy Chase Lapine, who initially struggled to find a publisher for her book (published this past April), tells the Times that she's "uncomfortable [that] those unusual combinations that I thought would brand me as a lunatic showed up [in Seinfeld's book], too." Adds her publisher, Perseus' David Steinberger: "We agree that the books appear to be very similar in many ways."