We have a Beneteau Oceanis 390 which lacked any form of book rack/ stowage although there was a wide shelf in the saloon.
Wandering around IKEA, I saw a simple wine rack (model name HUTTEN) that I thought would form the basis of a book case for the usual collection of navigational publications.
The wine rack came with a collection of dowels and battens drilled to suit so it was pretty easy to use most of these to form the structure. All that I had to add was a length of 12 mm dowel from local builder’s supplier and a few additional holes in the battens. The book case fitted neatly onto the saloon shelf and I braced it off the hull lining with short lengths of dowel. A few coats of stain and varnish completed the job. Total cost about £9 and about 3 hours of work.