covers is incorrectly written, and should be written as "covers" being its meaning: Cover is the cover or a book cover. Also refers to cover to cover discs, cassettes, video cassettes and similar. The covers is the inner part of such cover or cover. Its correct writing carries graphic accent or tilde in the third, as if against is prefix, it should be remembered that the Castilian spelling stipulates that preset voices form a morphological and prosodic unit and, therefore, prefixes must be always soldiers graphically to the base affected, and in this case a sobresdrujula word that should tilt formed.