Yep, [url=http://www.forgeworld.co.uk/New_Stuff/THE_HORUS_HERESY_BOOK_FIVE_TEMPEST.html]here it is folks.[/url].
Priced the same as the first three at £72.00.
Contents page is interesting. Elsewhere, FW have been bigging up their 40k Renegades range as suitable for representing Warp Cults, so I'm just as interested in seeing what toys Imperialis Militia get to play with.
It's out on Friday, so hopefully I'll be nabbing me a copy at London Comicon on Saturday.