Some of the Hoefler Knockout fonts are pretty close but the K doesn't quite match, because the arms intersect before the stem a bit.

- Mike Yanega

Thanks bowfinpw,

I think i got my answer...
from the Aiga design archive website we can read:

Typefaces: Customized typeface on cover and chapter openers

http://designarchives.aiga.org/#/entries/%2Bid%3A21145/_/detail/relevanc...

However, it's really close to Knockout n50 and n30...

Thanks !