I just selected the basic book. The confirmation bit then asks for your country and *adds* the p&p to your pledge, so your 35 euros pledge becomes 55 euros (for the UK).
Badly phrased on their part, but technically true, in that p&p isn't charged separately after the campaign.
Given that KistStarter itself takes 10% of the pledge amount as its fee, I wonder if they're front loading that cost onto the p&p charge