You really can't blame IDW for giving people a lack of choise, really
1. There's book 1-3 collected in a slipcase, with discounted prices from buying the books singely.
2. For those who like it BIG
: They're launching a series called PRESTIGE EDITION, which I believe is something like 10*13 inches (and also quite pricey).
30 Days of Night:http://www.amazon.com/Days-Night-Prestige-Steve-Niles/dp/160010956X/ref=sr_1_1?ie=UTF8&s=books&qid=1305624184&sr=1-1
Return to Barrow: not yet announced
3. And then there is an upcoming Omnibus edition,collecting the original trilogy.
Omibusi are bit smaller than regular book size, but also cost much less.
So, there's your choise, if you haven't bought and read the series before, that is.
None of these are out yet, they're coming this summer and autumn.