Thanks for the detailed reply. Are u suggesting, that the information in Sigmars Heirs replaces the info in death on the reik, and Realm of the ice queen replaces Something Rotten in Kislev?
If so that would be great as these books are much easier to get than the 1st Ed books.
Yes and no. I mean, that back in the WFRP1-days (decades ago) there wasn't any Sigmars Heirs type of sources. When original TEW was published it actually build the base for all this information. Campaing was not only adventuring-campaing, but all the books were also sourcebooks providing ALOT of rich background information that was missing back then.
For example Death On the Reik was not just great adventure, but it provided huge River Life of the Empire -source (this including river travel, encounters, trading rules, ship/boat types/images…etc) and maps of various places in the river (where adventure takes heroes) AND finally Gazetteer of the Reik. NOT to mention the poster-map of the Reik. So, this was very valuable source back-in-the-day. That is partly why the campaign was so legendary.
Now, we have Sigmars Heirs, which provides updated information about entire Empire. For WFRP2 there is also river and trading rules in the Warhammer Companion. As for the Kislev - Realm of the Ice Queen provides much more updated info, AND MUCH MORE INFO, than Something Rotten in the Kislev. But remember - They do not replace those adventures (parts of TEW campaing), just provide more updated background info.