I highly, highly recommend this one. Not so much for the adventure - Missing Blood is, well, average to mediocre - but for the sizeable fiction piece that comes with it. Told in IM conversations, diary entries, letters etc, it charts a reporter's investigation into the UB - and the consequences thereof. I still read it as a pure work of horror fiction.
Incidentally, gang - and I'm taking this bit to spoilers...
[ Spoiler ]
Does anyone else think Zeb and Icepick survived? The bodies they ID'd were by all accounts badly burned, having been at ground zero of an explosion and fire. Also, someone using the Icepick handle was posting in the Neo-A's Guide to NA after her supposed death. I personally parlayed that into a sequel...