Sketchbook collection

This is a few sketchbooks from my collection. I like making collages. It's started a few years ago. Usually in this kind of artbooks I am using acrylic paint. It's a spontaneous messy sketchbooks. I am realy enjoy a time I spend with my dear friends sketchbooks. Also I have a lot of simple sketchbooks where I am drawing using a black pen or a pencil.

And a few pages from my collage-sketchbook: