I have a HP/Compaq TC-1000, and one of my intial reasons for getting it was to use it for reading all of the PDF's techie books I have; unfortunately I never used it for that (not too much anyway). Don't get me wrong, it's lighter than the convertables but still a little hefty if you have to hold it in the crook of your arm for too long. It gets a tad warm after it's been on for a while, but if you're only going to be reading books then I don't think it will get too hot. I guess I never found too much time to use it for an eReader. Spiffy TabletPC and the original battery I had could get me almost 6 hours if I wasn't using wireless. If it's any representation of how much I liked it, I bought mine about 3 1/2 years ago and just recenty pivked up a new laptop (after I just bought a new battery to boot, ack!).
Good luck finding what works for you, I'm sure you'll find something.
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