Task: Create a Room database that has a table named Book with fields id, title, and author. Implement a DAO (Data Access Object) method that fetches all books written by a specific author.
Input Format: The Book table will have a primary key id of type int, a title of type String, and an author of type String.
Constraints: id is unique.
Both title and author fields have a maximum length of 100 characters.
Output Format: The DAO method should return a List of Book objects written by the specified author.