learning linear algebra So I'm a college student that has taken 3 semesters of calc/diff eq/linear algebra and I think linear algebra has been by far my favorite course so far and I would love to know more in the subject, the style of a consistent theorem/proof approach really appealed to me. So I ask what is a good book or resource to learn more advanced linear algebra or should is there other subjects I need to come to grips with first?
specifically I'd like to become more familiar with metrics/tensors

Without a doubt, "Linear Algebra" by Serge Lang. 
(A note of caution-there is also "'Introduction to Linear Algebra" by Lang-a fine book by itself, but from your question, you are looking for a more advanced text, like the first.)
