The best book by author Ken Follett can be debated amongst his readers, although many consider "The Pillars of the Earth" to be his best book. The book is set in the middle of the 12th century and focuses on the building of a cathedral in Kingsbridge, England.
"The Pillars of the Earth" was first published in 1989 and ultimately became Ken Follett's best-selling book. The book continues to sell roughly 100,000 copies per year in the United States. Follett says it's the book that he's asked about most frequently by readers he meets in bookstores. In 2007, Follett published a sequel to "The Pillars of the Earth" called "World Without End."