The Dr. Seuss book that has sold the most copies is Green Eggs and Ham, published in 1960, it has sold over 6 million copies.
Another 1960 book, One Fish, Two Fish, Red Fish, Blue Fish, has sold nearly as many.
The Dr. Seuss book that has sold the most copies is Green Eggs and Ham, published in 1960, it has sold over 6 million copies.
Another 1960 book, One Fish, Two Fish, Red Fish, Blue Fish, has sold nearly as many.