My DS6 is probably equally advanced in reading and Math (several grade levels above in each). While reading got everyone's attention when he was little (like 2 and 3) math is what gets everyone's attention now. They have to have a different placement for him for math, and reading I am not sure they are accommodating as much as they should/could. With our DS they have subject accelerated him about 2 years for reading and +3 for math. Can't complain at all though, they have really done a lot. Anyhow, I have noticed that whether gifted in math or reading, each have their struggles and rewards. Regarding book suggestions, DS has enjoyed David Schwartz books (If dogs were dinosaurs, How much is a million?, If you hopped like a frog, G is for googol). There are a bunch more that are pretty cool and there are great illustrations!