Unlike Asimov's previous compilation of jokes, Isaac Asimov's Treasury of Humor, this one isn't divided into categories; rather, it's a long story of one joke flowing neatly into the next one, with banter inbetween.
I like this style much better, as evidenced by the copious amount of dog-earing in my paperback edition.
Let me give you some samples.
One psychiatrist met another and greeted him with, "You're fine; how am I?"
A German was giving an impassioned speech at the United Nations and the interpreter was silent.
"What's he saying?" someone whispered to the interpreter.
"I don't know yet," said the interpreter. "I'm waiting for the verb."
An astronomer said, "What's the use!
Our classical knowledge is loose.
There can be nothing stupider
Than to name that world Jupiter,
When we all know it should be called Zeus."
"As for screwing," said Little Miss Muffet,
"I proclaim here and now that I love it.
I defy the authority
Of the Moral Majority.
They can take all their preaching and stuff it."