Reports on uninformative parts of books? (6)

I believe the answer is:

covers

I believe this clue is a double definition.

'reports on' is the first definition.
('cover' can be a synonym of 'report on')

'uninformative parts of books?' is the second definition.
(book covers)

(Other definitions for covers that I've seen before include "Bedclothes" , "Forms a layer over" .)

I've seen this clue in The Guardian.

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