The No. 1 book in the world is “The Da Vinci Code” by Dan Brown. This book has been the top-selling book of all time since its release in 2003. It has sold over 80 million copies worldwide and has been translated into 44 languages.

The book follows the story of Robert Langdon, a Harvard professor of symbology, as he attempts to solve a murder mystery. Along the way, he discovers a secret that has been hidden for centuries. The book is a thrilling and suspenseful read that has captivated readers all over the world.

The book has also been adapted into a movie starring Tom Hanks and directed by Ron Howard. The movie was a box office success and further increased the popularity of the book.

The book has been praised for its captivating plot and intriguing characters. It has also been criticized for its historical inaccuracies and religious themes. Regardless, it has become a global phenomenon and has been on the top of the best-selling books list for over a decade.

In addition to “The Da Vinci Code,” the top 100 best-selling books of all time include several other books from the Harry Potter series by J.K. Rowling. The series has sold over 500 million copies worldwide and has been adapted into a successful movie franchise. Other books on the list include “The Lord of the Rings” by J.R.R. Tolkien, “The Alchemist” by Paulo Coelho, and “The Catcher in the Rye” by J.D. Salinger.

In conclusion, “The Da Vinci Code” by Dan Brown is the No. 1 book in the world. It has sold over 80 million copies worldwide and has been adapted into a movie. The book has captivated readers all over the world with its thrilling plot and intriguing characters. It has been on the top of the best-selling books list for over a decade and is a true global phenomenon.