“Bring a book” permits bringing one qualifying instance of the class of books, without identifying a particular title.
The source note describes this as «فرداً شائعاً في جنسه»
An unspecified individual within its genus.
This does not mean the instruction requires all books. An unqualified request for one book may be fulfilled by one member of the relevant class. This later helps distinguish mutlaq from the general expression, am.
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Mutlaq and Muqayyad: Definitions, Qur’anic Examples and Legal Effect
“Bring a book” permits bringing one qualifying instance of the class of books, without identifying a particular title.
The source note describes this as «فرداً شائعاً في جنسه»
An unspecified individual within its genus.
This does not mean the instruction requires all books. An unqualified request for one book may be fulfilled by one member of the relevant class. This later helps distinguish mutlaq from the general expression, am.