[quote name='Rocko']Temp, do you read The Walking dead by issue or by TPB?
The thing I hate about picking up a series when it's already progressed so far like TWD is that there's so much to catch up on, it's expensive as

.[/QUOTE]
I read it by TPB.
Yeah, they aren't cheap and they only take about five minutes to read, so it can be costly.
Anyway, you have a few options. First, don't buy them at a store like B&N unless you know somebody who works there that can hook you up with their discount (I did).
Second, they do have larger collections available, but you'll wait that much longer inbetween releases. It's probably cheaper to go bulk that way, but it depends on how long you want to wait.
Third, you could check ebay for lot auctions that has a bunch in one. You'd probably save quite a bit of money that way.
Lastly, I usually buy mine from Deepdiscount.com because quite often they'll have some sort of coupon that lets you save on their book selection, or, buy used (or new) from private sellers on amazon.
Hope that helps.