I've currently got 3 books on the go:
Red Mist by Patricia Cornwell - been reading this since I was bought it for Xmas, but it's a bit like wading through treacle, definitely not her best work.
I also have Complicit by Nicci French on the go -started reading it while visiting my parents at the weekend, so brought it back with me to finish off.
And then I also have my kindle, which I tend to read during my lunchbreak at work a couple of times a week. Not sure what I'm reading on there at the moment, as I tend to download a lot of the free books, have quite a few crime novels to wade through - in the middle of one of them atm, not sure what it's called or by who, just free and good enough for reading at work when I'm likely to be interupted even though I'm on my lunch break.
Got a whole pile of 2nd hand books sat at my parents place waiting to be read atm thanks to my sister buying me a whole stash of them as an extra Xmas pressie... I just bring a couple back with me each time I visit! Then once I've read them, they head back to the charity shop!