Bog standard Kindle works a treat. My wife uses it on her two hour a day commute and I charge it every three or four weeks but... there is no back light so no good in the dark you need a little light as you would with a book; I've a little clip on LED from poundland which works just fine. Kindle do a version that is back lit but the battery performance is nowhere near as good.
When you start looking at the likes of tablets, they are more multifunctional in that you can watch films, listen to music, browse the net but battery life means you would need a charger or battery pack if you took it camping for a weekend. Also remember that you can only access the internet if you have some sort on internet connection whether it be a (very local) free wi fi hotspot or if you can plug in a dongle and pay for net access.
So, long time reading = basic kindle and some sort of light for camping (head torch will do) = £69
Tablet like an android tab or the samsung, ipad et al = much much less reading time between charges = £75 - £450
http://www.amazon.co.uk/gp/product/...&pf_rd_t=101&pf_rd_p=377610187&pf_rd_i=468294 I'm confident you would have more books than you could read in a year within no time of getting one
