Estlor said:
As the others have stated, the B series was repackaged later in its life as a single book and set to run as a big mega-adventure. Because of that, most of them can be placed in or around Karameikos and its immediate neighbors (Ylaruam, Darokin, and Glantri... even though Glantri is more of a neighbor to Darokin).
I've often said that the B1-9 compilation is like a greatest hits CD for your favorite band that doesn't have your favorite songs, and the songs they do have are crappy live versions or re-mixes.
B1 is not included except for some maps. No room descriptions, background, nothing.
B2, The Keep on the Borderland, is missing the KEEP!
B4, The Lost City, is missing THE LOST CITY, as well as the lower half of the pyramid.
B5, The Horror on the Hill, is missing THE HILL and the THE HORROR, and only contains an old abbey filled with hobgoblins.
B6 doesn't have any of the cardboard punchouts that were the only things that made this adventure worth-while in the first place.
B8 doesn't have 2/3 of the wilderness areas of the original.
B9 is missing 2 of the 5 mini-adventures.
The only ones included in their entirety are B3 and B7 (and B6 if you don't mind not having the city cut-outs, which were to my mind, the big attraction to that module in the first place.) All the other adventures were hacked in a pretty major way. The overall campaign connectors is nothing special at all, and nothing any DM trying connect adventures that don't have anything to do with one another can't come up with on his own. Further, B3, B7,and B8 really don't fit well with the established Karameikan setting (heck, B3 was originally set in Glantri and fits MUCH better there). Further, there is so much here, your characters will likely have surpassed the level recomendations before even getting half-way through, necessitating you re-statting everything (which might not be that big a deal if you're already converting to 3e anyway).
Adding in the price of finding a hard copy of the thing (~$30), you are probably much better off getting B1, B2, B3, B4, B5, and B7 individually and calling it a day.
R.A.