If you want an ebook reader and you have £70 or more to spend, you'll want to buy an Amazon Kindle. You'll be forever locked into buying books from Amazon's shop, but what a shop it is. The size and power of Amazon means that publishers have made available almost all of the titles you could want in digital form, and you can download meaty samples of the books before you decide whether to buy them or not.
If you're in this price bracket, your choices are now essentially narrowed to the basic Kindle for £69, or this £109 'Paperwhite' model with a higher-resolution screen and a screen light. If you can afford the extra, text on the Paperwhite screen looks better than on the normal Kindle, much more like a real book, although we're not yet at the stage where you can't tell the difference between the two.
Long battery life
As with previous models, the battery on the Paperwhite lasts forever -- a week or two for me, depending on how much I read. When you're used to charging a phone once or sometimes twice a day, that's as close to forever as we're going to get for a modern gadget.
This Paperwhite is actually an upgraded version of last year's very similar model -- it has a faster processor, which makes pages turn slightly faster, and a better light, which is brighter and more evenly lit across the screen. Neither of those things particularly matter and aren't reasons to upgrade from last year's Paperwhite if you own one, but they are nice to have.
A new light
Having a light on your Kindle isn't essential unless you read in the dark regularly, but it is a useful addition. It's easy to adjust the brightness of the light from the touchscreen controls, and Amazon says that having a strong light helps prevent screen glare when you're reading in the sun. I'd love to be able to test that claim, but the British winter makes it impossible. It works well in the dark though, although I found it irritating that you have to adjust it manually, rather than the light automatically compensating for its surroundings.
In addition to longer battery life, one of the reasons to read books on a Kindle rather than a tablet is the weight of the device. At 206g, it's well over 100g lighter than a Nexus 7 or an iPad mini, for example, so when I'm reading I find a Kindle much more comfortable.
The major downside is that pictures don't look particularly good on the screen, and they are black and white. If that's an issue for you, Amazon has Kindle apps available for Android tablets, iPads, phones and PCs, where you can download the books you've bought in colour.
The Kindle will sync your last read page across different devices, so providing the product you're using to read on is connected to the Internet, you won't spend ages flicking through pages trying to find your place in a book. Compared to a phone or tablet, text is more comfortable to read on the Kindle's E Ink screen, as you don't have a backlight shining into your eyes tiring them out.
The new version of the Paperwhite includes some extra software features. Firstly, it makes it easier to skip through the book by adding a slider to the bottom of the screen you can drag to move quickly through pages. Next, every time you look up a word in the built-in dictionary, it's added to a list so you can look back at it later.
That's nothing Earth-shattering, but one good idea is Kindle Freetime. This lets you set up a password-protected area for your children that shows only the books you choose them to see, and monitors how long they read for, encouraging them to hit a time target set by you. Children can also use the vocabulary list, which seems to make more sense than for adults.
Buying books from Amazon's own shop is fairly simple using the Paperwhite and the touchscreen keyboard if you know what you're looking for, but it is still easier to use a computer to browse for what you want. Providing your PC and Kindle are connected to the Internet, your purchase will be downloaded to the Paperwhite within seconds with nothing else for you to do.
Amazon has improved the best e-reader on the market, with the only major things to dislike the now relatively high £109 cost of the device and the miserly lack of charger in the box (you get a USB cable, but will need to find your own charger or plug it into a PC). Providing you're happy to surrender all your future book purchases to Amazon's care, it's a great buy.