Hello all, I've been reading Apostol's Calculus online (with Amazon's "search inside this book" feature - it's cumbersome but it works.) However, I recently decided to purchase the physical book. I got a very good deal from a used bookseller advertising the 2nd edition of the book (which I had been reading). However, the 1st edition of the book was shipped to me. I was wondering if anyone could tell me what the differences are between these two books. Should I try to get my money back? Is the second edition much better than the first? What does it cover that the first doesn't (or vice versa)? Thank you.