Kobo on Monday introduced the Aura HD, an e-reader that sports some high-end touches such as a one-month-plus battery life. Other features that set the Aura HD device apart from other e-readers in the market include a high- resolution E Ink display and a 6.8-inch screen designed to look and feel more like a book. The Aura HD, which retails for $169.99, became available for pre-order on Tuesday on the Kobo site.