Pronunciation: [mˌe͡ɪk bˈʊk ˈɒn] (IPA) 
The correct spelling of the phrase "make book on" is "make a book on." The IPA phonetic transcription of the word "book" is /bʊk/. The addition of the article "a" before "book" is necessary to create a grammatically correct sentence. The phrase means to create or write a book on a particular topic. Proper spelling and grammar are important in conveying clear communication and avoiding confusion.
The phrase "make book on" is an idiomatic expression with gambling origins, typically used in American English. It refers to the act of accepting bets on a particular outcome or event. It is commonly used in contexts related to sports or other competitive activities where predictions are made and wagers are placed.
In sports betting or gambling, individuals who "make book on" are those who establish and accept bets from others on the outcome of a game or event. This can be done professionally or informally, with individuals taking on the role of a bookmaker. Bookmakers set odds for various outcomes, such as the winner of a game, the final score, or the occurrence of specific events within the game. They then accept bets from individuals who believe they can predict the outcome accurately.
The term "making book on" can also extend beyond the gambling world to refer to any situation where individuals accept and compile bets or predictions. It may be used figuratively, indicating that someone is confidently predicting or speculating about a certain outcome, even if there are no actual wagers involved. In this sense, it suggests a level of certainty or confidence in one's prediction.
Overall, to "make book on" means to establish and accept bets or predictions regarding the outcome of an event, often with a focus on sports or gambling.
