Basically, there are four different models of Kindle ebook reader: Kindle Fire, Kindle Touch, Kindle 4 and Kindle Keyboard.

Kindle Fire, Kindle Touch and Kindle 4 are the most recent models of Kindle ebook reader - they are launched in September 2011.
Kindle Fire ebook reader has the following features:


- Kindle Fire has 7" multi-touch display with IPS (in-plane switching) technology and anti-reflective treatment
- resolution 1024 x 600 pixel
- 16 million colors
- 8GB internal storage
- Size of Kindle Fire ebook reader is 7.5" x 4.7" x 0.45" (190 mm x 120 mm x 11.4 mm)
- weight of Kindle Fire ebook reader is 14.6 ounces (413 grams)
- Kindle Fire ebook reader is capable to hold 10 movies or 800 songs or 6,000 books
- Battery lasts up to 8 hours of continuous reading or 7.5 hours of video playback without charging.

Kindle Touch is latest generation of Kindle ebook reader.
Kindle Touch ebook reader has the following features:

- It has E Ink display with multi-touch
- Kindle's display reads like real paper even in bright sunlight
- Kindle Touch is lighter and thinner than book or magazin - it is only 0.40" thin
- Size of Kindle Touch ebook reader is 6.8" x 4.7" x 0.40" (172 mm x 120 mm x 10.1 mm)
- Weight of Kindle Touch ebook reader is 7.5 ounces (213 grams).
- Kindle Touch ebook reader is capable to hold 3,000 books
- Battery lasts up to two month without charging based upon a half-hour of daily reading time.
- 4GB internal storage

There are  two different models of Kindle Keyboard ebook reader: Kindle Keyboard with 6" E-ink display and and Kindle DX which comes with 9.7-inches display. Kindle Keyboard ereader comes in two colors: graphite or white. This model of Kindle Keyboard ebook reader is in Graphite color. Kindle Keyboard ebook reader comes with Wi-Fi and free 3G wireless. This model of Kindle Keyboard ebook reader has the following features:

-It has e-ink display that reads like real paper even in bright sunlight.
-it is lighter and thinner than book or magazin - it is only 1/3 of an inch thin and has weight of 8.7 ounces (247 grams).
-Kindle reader is capable to hold 3,500 booksliving room.
-Battery lasts up to two months without charging based upon a half-hour of daily reading time.
-Kindle reader comes with free 3G wireless - so you can download books and magazines anytime and anywhere in more than 100 countries round world. There are no montly fees for downloads - download books in under 60 seconds.

This model is basic model of kindle ebook reader and it is the cheapest model of Kindle ebook reader. It comes with Wi-Fi only (without free 3G). It has the following features:

- It has e-ink display that reads like real paper even in bright sunlight.
- This model of Kindle reader is only 1/3 of an inch thin and has weight of 5.98 ounces.
- This model of Kindle ereader is capable to hold 1,400 booksliving room (2GB storage).
- Battery lasts up to one month without charging based upon a half-hour of daily reading time.
- Eght different text sizes and three font styles..
- Kindle ereader comes with Wi-Fi - supports public and private Wi-Fi networks or hotspots.

Kindle DX model comes with 9.7 inches screen size. This model is Kindle DX and it is in GRAPHITE color. Kindle DX ebook reader comes with Wi-Fi and free 3G wireless. This model of Kindle DX ebook reader has the following features:

-It has e-ink display that reads like real paper even in bright sunlight.
-This model of Kindle ereader is only 1/3 of an inch thin and has weight of 18.9 ounces
-Kindle DX ereader is capable to hold 3,500 booksliving room.
-Battery lasts up to three weeks without charging.
-Kindle ereader comes with free 3G wireless - so you can download books and magazines anytime and anywhere in more than 100 countries round world. There are no montly fees for downloads - download books in under 60 seconds.
Kindle pdf reader has auto-rotating screen - Kindle's display auto-rotates from portrait to landscape as you turn the device.

Kindle ebook reader is Amazon's innovative  electronic reading device that wirelessly downloads books, magazines, newspapers, blogs, and personal documents to a sharp , high resolution electronic paper screen that looks and reads like real paper. Kindle ebook reader fits comfortably in one hand for hours, has an e-ink screen that is easy on the eyes even in intense sunshine. In addition , it has free 3G wireless and up to a month of battery life (with wireless off). Customers can read and sync their Kindle books on iPhones, iPod touches, PCs, BlackBerrys, Macs and iPads devices or in other words you can start reading book on the Kindle electronic reading device, switch to the iPod Touch and basically go back and forth without losing your place.

Where to buy Kindle ereader in USA ?

If you wish to buy Kindle ereader in USA, your first place to look for it is, obviously, at Amazon. In addition, at Amazon's Kindle Store you will be able to get all Kindle accessories and Kindle books. Shoppers have become familiar to shopping at Amazon because it is a great way to shop from the privacy of your house without having to run to a shopping center or store. If you get Kindle ebook reader from Amazon it comes with free two-day shipping (for US customers only). When you buy Kindle electronic reading device from Amazon, you'll have the advantage of shopping directly from the Kindle Store for books, newspapers, magazines or blogs.  Kindle's features and the extremely large selection of over 670,000 books offered in the Kindle Store, have made this wireless reading device the bestselling product at Amazon.

It is also posible to buy Kindle ereader in all Target stores, Staples, Best Buy, Walmart, Fred Meyers and Toys R Us stores. The Kindle ereader was firstly made available at Target's location in Minneapolis and stores across Florida. The Target stores were the first brick-and-mortar stores in USA to offer the Kindle ereader.

There are four different models of Kindle ebook reader: In addition to the existing Kindle Keyboard model, Amazon launched 3 more models of Kindle ebook readers in September 2011 for USA market. New product line includes the Kindle Fire tablet,  Kindle Touch and new Kindle 4.
Kindle Keyboard model has 6” display (comes with free 3G + Wi-Fi). There is option of Kindle Keyboard that comes with Wi-Fi only (without free 3G). Kindle Keyboard DX is the only Kindle ereader that has 9.7” display (comes with free 3G + Wi-Fi.
New Kindle 4 ebook reader and Kindle Touch ebook reader still have e-ink display that is easy on the eyes even in bright sunshine, while the Kindle Fire comes will full color backlight display. New Kindle ereaders are now smaller, lighter, and faster - physical keyboard disappears to make them more compact and more mobile to take them everywhere.

If you wish to read books from Kindle Store, you do not have to buy Kindle electronic reading device. It is possible to read Kindle ebooks even if you do not have your Kindle ebook reader with you or if you do not own a Kindle ebook reader . Kindle ebook reader is Amazon's modern electronic reading device that wirelessly downloads books, magazines and newspapers to high definition electronic screen that looks and reads like true paper. Amazon has pursued a strategy of making Kindle books available across multiple gadgets. Users are able to read and sync their Kindle books on the iPhone, iPod Touch, iPad ,PCs, and soon BlackBerry. If you buy iPod Touch or iPhone, the Kindle reader app is a free download.

You can not shop for Kindle ebooks in Apple's App Store. Users must still buy those books through the Kindle Store — either on a Kindle ebook reader or through a Web browser on a computer or one of the Apple devices. You can get free ebook samples; read the first section for free before you decide to buy. Then, ebooks you've purchased are wirelessly moved to the iPhone or iPod Touch via Amazon's servers. There are more than 620,000 ebooks in Kindle Store including many of the New York Times bestsellers.

At the present time, Kindle newspapers, magazines, and blogs are not available on the iPod touch or iPhone- lots of that material is offered anyway on the iPhone via the Web.

Flipping pages on iPod Touch is really easy — just swipe the screen lightly with your finger. You can alter the font size (5 sizes), bookmark pages for later references, and search the Table of Contents. A little bit bigger screen would make it a little easier to read, but I didn’t find the small iPod Touch display to be annoying.

You can begin reading on the Kindle ebook reader, switch to the iPod Touch and basically go back and forth without losing your place. Books you’ve already purchased for the Kindle device, undoubtedly , can be placed on the iPhone or iPod Touch as well.