Paper architecture has always had its fascination. After all, if architecture is about ideas (or, as Ruskin claimed, about painting and sculpture), does it matter if the building is ever, you know, built? Speculations about the nature of architecture abound in a book edited by teacher and writer Kester Rattenbury, published by Routledge. An unusual and stimulating series of essays, well illustrated, look set to guarantee her a long round of invitations to lecture. Check it out.