It was made whit silk screen printing. First I had to make the drawings on transparent paper and after we light down it to the screen. The illustartions were printed whit two colors in a lot of different variations.  

All the pages were printed on the same sheet of paper and folded into a book in a very special way without gluing.

Playlist of the songs:
https://www.youtube.com/watch?v=W8r-tXRLazs&list=PL9CwjK4c3vTF3IVkUDNea6P2qXCJrpV3H