Since 2001 I'm making these oblong concertina books. The term 'concertina' refers to a method of parallel folding with the folds alternating between front. This picture shows a detailed view of two of these books. Mustn't read too much into it: the top one is just a compilation of different paintings and text blocks without any cohesion. The only consistency would be color. The bottom one is about an long adventurous  trip I made from Belgium to Iran.