Green Eggs and Ham is the Dr. Seuss book that has sold the most copies, with over 8 million copies sold worldwide.
the Bible
The Lightning Thief has sold the most copies at more than 1.2 million copies.
The Bible
the soldiers of halla
secret of the moon princess
The Bible has sold the most copies in history, with estimates ranging from 2.5 billion to 6 billion copies. The second best-selling book is "Quotations from the Works of Mao Zedong," also known as the "Little Red Book," with over 900 million copies sold.
1000 copies have been sold
On all the books it says the same thing but i think the 9th sold the most because of its opening
Harry Potter
150 million copies of LOTR have been sold. It is also the second most sold novel in the world. My source: Wikipedia
Don Quixote by Miguel de Cervantes Another Answer: Though the above book had many copies sold, particularly in Spain, no book has sold more copies than the Bible in the history of literature.