In the document properties in this PDF, it's called "Black-Medium" and "Black-Bold", but I have no idea where it may be found. Maybe it a custom font or modified from Century Gothic?
http://www.osloeditions.com/PDF/CONTRA_MUNDUM_V.pdf

The one that shows up everywhere might be Planeta.

the Black is an early version of the Brown, by Aurèle Sack.
It is in use (clear text) on the swiss design awards website: http://www.swissdesignawards.ch/

The Brown will be released any time soon on lineto.com.

looks amazing, thank you!

I wonder what's the idea behind Aurèle's naming of his fonts? --Black, Brown & Purple?
http://www.a--s.ch/work/