خُذْ هَذَا الْفَرَسَ
Take this horse.
If the speaker points to a book and mistakenly treats it as an instance of “faras,” this is an erroneous application of an assigned term. Not every deviation from the expected referent is a meaningful figure of speech.
Figurative usage requires an intelligible relation and suitable context. Arbitrarily calling a book a horse, with no communicative relation to exploit, does not amount to the structured transfer of meaning examined in rhetoric.