Kobo, an e-reader maker closely aligned bookseller Borders, has released a Wi-Fi version of its namesake device that's the same price as Amazon's cheapest Kindle. The Kobo e-reader, which had sold for $130 without Wi-Fi, was available as of Wednesday for pre-order for $140 on Borders' Website and for $139 on Kobo's site. The new e-reader is scheduled to start shipping next month. The latest release brings the Kobo on par with Amazon's Wi-Fi-only version of the Kindle, which sells for $139. Both e-readers have the same high contrast, E Ink digital paper display that is readable even in direct sunlight.