I checked out a very nice copy of Euclid's Elements from my university library containing unabridged translations of all 13 books. Nice big book, one proof per page, lots of diagrams. It's been interesting so far to flip through and even work a couple of the proofs myself, but now I want to really get into it. On the other hand, it doesn't seem like a normal textbook where you read through it a few times, take notes, and solve a few problems, and it certainly doesn't seem like an ordinary book one just reads cover to cover. How do I most productively tackle this thing?