I always liked geometry at school, so by the side of my normal studies I've been going through the Khan academy videos. Could anyone suggest some good books that takes these geometry topics further? I'm not sure which subject area to look into now. Is the next thing manifolds?
I should say that I've just finished my first year of calculus (economics), but as I'm not taking a maths degree, I won't be studying things like analysis or abstract algebra, etc, and I don't know if there are any prerequisites that I need to look into first, or really even what the next subject is, I just kinda like shapes and stuff! ;)
Anyway thanks for the help.