Literary work that gets thrown at people? (4)

I believe the answer is:

book

I'm a little stuck... Click here to teach me more about this clue!

'literary work' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for book that I've seen before include "Bound volume" , "Reserve - volume" , "Show yellow card" , "See 1 ac" , "strict regulations" .)

I've seen this clue in the Evening Standard.

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