I've noticed that the first edition has 250 some odd pages and I believe the last edition has over 500 pages. Would I be missing out on any material if I bought an earlier edition? I have a limited amount of time so the shorter the text the better. I also noticed it does not use Epsilon Delta proofs. Most texts make a big deal about the limit setting Calculus apart from all other mathematics so I'm wondering if this is something that should be covered.