Conversation so far:
who is the illustrator for green eggs and ham
when was green eggs and ham published
Green Eggs and Ham is a children's book by Dr. Seuss, first published on August 12, 1960.
how many copies has green eggs and ham sold
As of 2019, the book Green Eggs and Ham has sold 8 million copies worldwide
how many words are used in green eggs and ham
The vocabulary of the text in Green Eggs and Ham consists of just 50 words

Question: how many books has the author written
Self-contained rewrite: how many books has dr. seuss written