Ask HN: Offline Advertising Impressions
Any ad networks able to sell ads/sponsorships based on offline impressions (printable PDFs with predictable translation from online to offline impressions)?
Agencies can aggregate across advertising companies if you want a wider reach and don't have the time yourself.
Basically hire and agency to be the expert, or decide where you want to advertise and ask for their media kit if they don't have it online already e.g. here is one from Condenast: http://www.condenast.com/brands/vogue/media-kit/print
Rates are almost always negotiable.