The answer to this question depends on the book.
It had taken him atleast 5 years to write one book.
10 years
The longest period it has taken to write a book was 10 years. War and peace.
The Book of Revelation in the Bible is thought to have been written around 96 A.D. There is no conclusive school of thought as to how long it took to actually write the book.
14 years
nelson Mandela write the book long walk to freedom because he wants to show people that you can fight in what you belive in
100 days
1 year
exactly 12 years!
2 hours
it depends on how long each book is and the time you out into it each day
Sense and Sensibility by Jane Austen is a novel that typically ranges from around 350 to 400 pages in length, depending on the edition and formatting.