Great resources on the above physics thread; we especially loved the Cartoon Guide and the Einstein book (seriously - who wouldn't want to measure the speed of light with a microwave oven and a giant chocolate bar?!). Also, Neil deGrasse Tyson's book (like Death by Black Hole), though not light reading (but great bedtime reading, according to Chay
). If you want to look at fiction as well, Stephen Hawking's kids novels were a big hit here. There are also tons of gorgeous "coffee table" kinds of astronomy books, and you can usually find them at book sales really cheap.
Beyond books, there is also a wealth of cool videos on the network, including tons of beautiful footage and explanations from NASA. Google "NASA youtube black holes", and DS is in ecstasy for the better part of a day (oops).
