Amazon's Kindle officially announces Oasis with a radical change in design.

It also happens to be the most expensive Kindle device in years priced at $290 for a base price and $380 for a top price. Users will get to experience a cellular connection of 3G without the interruption of the lock-screen ads.

The screen of the Oasis is very thin at 3.4mm with a wider body. The device includes two vertical button for turning the pages and a touch screen, and enough space around the buttons for a better grip on the device.

Kindles thinner design could mean low built-in battery life than previous models, although Amazon added a leather charging case for long lasting power. Amazon also arranged the dual-battery to keep the device running for months.

The Oasis's screen is probably the only element with less changes, measuring at 6 inches diagonally like Kindle's previous generations. The device boasts 300ppi high-definition display like the Voyage and Paperwhite. In addition, Amazon said the device now gives more lighting across its face by improving its light-distribution system.

One thing missing from this premium design is waterproofing, Kindle's longtime selling-point was based on how it would be easy for a user to tote their devices around while reading outdoors.

The commitment of Amazon to books has shown to be better than ever, the company has also shown a mark of 4.4 million books in bookstores across the U.S, where they even have their own publishing platform under Kindle Direct Publishing.

The Kindle Oasis is now available for preorder, with Amazon confirms shipping to customer from April 27.