Thanks guys, she's got wireless at home and I'd set it up for her. I'll have a look at project guttenberg for freebies.
TomTom's point above about font size is one of the features that surprised me. I hadn't realised how small some typesetting is getting in some modern paperbacks and I realised I've not finished some books simply because it was too exhausting on my ageing eyes and befuddled brain.
Normal PDFs (i.e. ones formatted to be printed on A4) are quite hard work on a kindle.......if you could find .mobi/.azw versions of textbooks i imagine that could work very well, though. would certainly save a lot of bulk and as bob suggested adding your own inline notes could also be pretty handy.
F*ck, misread your post Paul... dick...I got one of these... a little (not much) too big but fine.. only £4 sheets. I have one of the leather amazon proper ones (that clips into the side) but I dont rate it - as its about as heavy as the kindle itself !TTNumber 4...
I'm going to go for an envelope / pouch style thingy as the kindle will spend a lot of time in my work bag