The Kobo Mini has a 5" e Ink screen and can hold up to 1000 books, £59.99 the Kobo glo has a 6" E ink screen with a back light that shines into the screen not out of the screen and the kight can be adjusted, it holds up to 1000 books or with up to 32gb micro sd up to 30,000 books, you can transfer pdf files using the micros sd card. it has built in chess souduko and note book, fully wi-fi with software that automatically upgrade therefore no need to upgrade your device, 1 month read only battery life, 55 hours with light, . the kobo aura hold the same amount of books has a light and has up to 2 months battery life or 55 hours continual read with lightm it has a 6.8
~H~D screen. the glo is 99.99 the aura 139.99
kobo store has over 3 million ebooks, 1 million of them free, all devices are fully wi-fi and charge from your laptop. you can use your county lending library and use google, facebook, twitter.
anyhthing wlse you need to know just ask, oh, they are open platform which means you can buy your ebooks from any site using the epub format.