Back in April Kobo introduced a luxury e-reader called the Aura HD. It was originally a limited time offer and would only stick around if it sold well. Now the device makes up almost a quarter of the company's e-reader sales and has paved the way for the new mid-sized model.

The Aura is basically a smaller version of its HD counterpart, boasting a more compact 6-Inch E Ink Display. Kobo has worked closely with E ink this time around to improve performance. CEO Michael Serbinis said the company has drastically reduced full page refresh times users have experienced in the past.

Inside, the device has a Freescale i.MX507 1GHz processor and it will also include a microSD slot to increase the 4GB of internal storage. The battery is said to last around two months, a number based on 30 minutes per day of reading and without using WiFi.

The Aura comes along with Kobo's basic software capabilities including note taking, font selections, highlighting and their usual sharing options. 

Kobo also announced three more new tablets at a recent event in New York. First, the company unveiled the Kobo Arc 7 Wi-Fi tablet and the HD version. They run Android 4.2.2 Jelly Bean and have 7-Inch touch screens. Next, Kobo dropped the Arc 10 HD that boasts a 10-Inch, 2560 x 1600 display with a 1.8GHz quad-core Nvidia Tegra 4 chip and 16GB of internal storage.

The Aura is expected to launch next month at $150, with pre-orders available now. The Arc 7 is also expected to be priced at $150, with the HD version at $200. The Arc 10 HD will run you $300.