The wording of today's challenge is odd so I'm going to interpret the question as books that were translated well on screen. Many of my favorite books were made into movies but not all of them were made into good movies.
Nine times out of ten, movies are unable to do justice to their source material when they're based on a book, however, there are some notable exceptions. Gone with the Wind is one of them. Not only is Gone with the Wind one of my favorite books, it is also my favorite movie of all time. I saw it three times before reading the book, something that couldn't be avoided since I first saw the film when I was seven years old, which may have influenced my opinion. Perhaps if I had read the book first I wouldn't have loved the film.
While the book is ten times better than the film, the movie is still amazing. Although many things had to be cut from the film, I still feel like it captured the essence of the book. The things that were cut were necessary, and didn't really change the story. Gone with the Wind also has the most perfect casting of a book character with Clark Gable as Rhett Butler. Usually I can find at least one thing to criticize, one detail that was wrong in the casting, but with Gable I can find none. He is Rhett Butler. Even Vivian Leigh, who did a great job as Scarlett, wasn't perfectly cast. She was much too beautiful. Scarlett was supposed to be pretty but not a great beauty. It was her her ability to manipulate men that drew them towards her, not her looks. Even with the inconsistencies, I still think the movie was cast well because the actors were all very talented. There is a reason Gone with the Wind has stood the test of time, and is considered to be the highest grossing film of all time when adjusted for inflation.
Honorable Mentions: Pride and Prejudice (BBC/A&E miniseries), Mildred Pierce (movie with Joan Crawford), Game of Thrones (just the first book—while I like the other seasons they deviated more from the books, and the books were much better).