Who's On First - Abbott & Costello

Comedy routine
In this famous sketch, Bud Abbott acts as a baseball coach who identifies players for Lou Costello, but the players' names can also be used as questions and answers, leading to misunderstandings. The routine is often referred to as "Who's on First?", but Abbott and Costello sometimes called it "Baseball".
Children's book
Written by Abbott and Costello and published in 1944, Who's on First? is a picture book in the children's non-fiction and literature genres. It's described as a laugh-out-loud book that will appeal to baseball fans, comedy lovers, and readers of all ages.

Wikipedia
Who's on First? - Wikipedia
"Who's on First?" is a comedy routine made famous by American comedy duo Abbott and Costello. The premise of the sketch is that Abbott is identifying the players on a baseball team for Costello. However, the players' names can simultaneously serve as the basis for questions (e.g., "Who is the first baseman?") and responses (e.g., "The first baseman's name is Who."), leading to reciprocal misunderstanding and growing frustration between the performers. Although it is commonly known as "Who's on First?", Abbott and Costello frequently referred to it simply as "Baseball". Abbott and Costello performing "Who's on First?" Contents.

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Abbott & Costello: Who's on First?
Abbott & Costello: Who's on First? Abbott & Costello: Who's on First? Abbott. Well Costello, I'm going to New York with you. The Yankee's manager gave me a job as coach for as long as you're on the team. Costello. Look Abbott, if you're the coach, you must know all the players. Abbott. I certainly do. Costello. Well you know I've never met the guys. So you'll have to tell me their names, and then I'll know who's playing on the team. Abbott. Oh, I'll tell you their names, but you know it seems to me they give these ball players now-a-days very peculiar names. Costello. You mean funny names? Abbott.