NEW YORK ( TheStreet) - Amazon ( AMZN) and Barnes & Noble ( BKS) may bring their e-readers to other retail outlets within the month. Rumors have surfaced that Amazon will begin selling its Kindle at Target ( TGT) stores, while Barnes & Noble will bring its Nook to Best Buy ( BBY). Gadget blog Engaget said it nabbed images of Target's inventory list that show Amazon's Kindle. The blog said it was told that the device will hit stores on April 25. The blog also revealed an image of Barnes & Noble's Nook behind-the-scenes at Best Buy, which is expected to start selling the device on April 18. This comes as Apple ( AAPL) reports that more than 450,000 of its iPad tablets have sold since it launched on Saturday, while more than 600,000 iBooks have been sold through the iPad. --Reported by Jeanine Poggi in New York.