From Longman Dictionary of Contemporary Englishbook tokenˈbook ˌtoken noun [countable] British EnglishBBT a card that you can exchange for books She gave me a book token for Christmas.
Examples from the Corpus
book token• A £10 book token will be awarded to the sender of the first correct solution opened on Thursday 7 March.From Longman Business Dictionarybook tokenˈbook ˌtoken British English a piece of paper worth a particular amount of money which can be exchanged for a book in a shopa £10 book token → token 