Although I am not sure when I would be able to afford it, this resource strikes as the kind that would be particularly useful not only in its own right, but in Logos (with links, tags, connections to guides, etc):
EDIT: fixed the broken link referenced in the reply below and replaced it with that supplied by Rick:
http://www.eisenbrauns.com/item/BORHELLEN
I have not been able to find a preview (although there are reviews that describe the contents).