Good general condition apart from two small losses (see last photos). The photos serve as a description. To access the key, push the element on the spine of the book slightly to the left. Remove the part on the side; the key is hidden there. Then push the first element to the right to release volume IV which hides the lock. The photos will perhaps be more explicit than this long speech If incompressible you will be able to reach me by telephone Dimension approximately 15x12x11cms Weight 600grs