I use a Zebralight H30. Other than the blue tint (the warm wasn't available yet), it's good enough for me.
My wife's tried reading with various headlamps, but has never been happy wearing one, and this year put "book light" at the top of her Xmas want list. I looked around, and pretty quickly concluded that all currently available book lights are junk (and I haven't seen anything in the past six months to suggest otherwise), but I ended up buying her a Mighty Bright XtraFlex 2. There's nothing about it that is impressive by CPF standards - 2x 5mm LED, typical 5mm blue tint, 3x AAA, etc - but the wife loves it, and she's gone out of her way to tell me so many times. :shrug: