The artist book BOL, presents a beautiful selection of blueprints and remnants of Blondeel's audiovisual work from 1987-1990. Led by a fascination for the intangible phenomena of light and sound, Maria Blondeel analyses the principles of geometric space into colourful print-based installations with the desire to reset the experience of the observer. Her installation Bal, Dozen en vazen (Ball, boxes and vases) of 1987, which comprised, amongst others, a projection of slides and a sound performance, started with a piece of advice by Paul Cézanne (1839-1906): "Traitez la nature par le cylindre, la sphère, le cöne, le tout mis en perspective {...}". Besides this, in a series of contact sheets one can observe how, back in the eighties, blueprints were projected on top of each other, after qhich they were photographed again. Recently, a selection of those analogue photographs was printed on Japanese paper. Blondeel literally connected the visual and auditory, by transposing images of the slide series into sound - called 'sonification". In addition, she published the booklet Verheven Werk libretto, opera elevato} in 1990, a libretto for four voices, which was recited simultaneously with th omonymous stereoscopic slide projection.