Reminds me of Neuzeit Grotesk.

I think the typeface is called Circular but I'm not sure. I'm fairly sure it is designed by Laurenz Brunner, who also designed the book.

Looks like Chalet Book.

It is Circular by Laurenz Brunner, it says in the back of the book.

Sam Mallett >>> interesting... perhaps this was a custom job— its not listed on the lineto site

Yeah, I think it was designed for the book, but it does say lineto.com in brackets so maybe it will pop up one day. Fingers crossed...

Circular has been released.
http://lineto.com/Lineto.com/Frontpages/2013/16+Apr+2013/