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DESCRIPTIVE THESAURUS COLLECTION – WRITERS HELPING WRITERS®
If a book is out of square, usually from resting crooked on a shelf, or leans to the right or left when on its back, it is cocked , or shelf-cocked.
Bibliophilia – Wikipedia
Synonyms for COLLECTOR: admirer, amateur, connoisseur, dilettante, groupie, authority, expert, addict, aficionado, buff. Synonyms for COLLECTION: assemblage, library, accretion, accumulation, cumulation, cumulus, gathering, lodgment.