So, you're new to Spare Parts?That's good. We like new readers. This is where you should start. It's a slightly edited version of the comic - we've cut out a few comics (45, to be exact) so that it moves quicker and you're caught up to the comic. You're not missing anything essential.
If you want the complete, unabridged version, go here. If you want the guided tour, or if you're in a bit of a hurry, then you're in the right place.