Here's a list of 20 top novels adapted into movies in Hollywood, along with brief explanations of each:

1. The Godfather (1972) - Directed by Francis Ford Coppola, this adaptation of Mario Puzo's novel is a classic crime drama exploring the Corleone crime family's power struggles.

2. To Kill a Mockingbird (1962) - Based on Harper Lee's Pulitzer Prize-winning novel, this film portrays lawyer Atticus Finch defending a black man accused of raping a white woman in the racially charged American South.

3. The Shawshank Redemption (1994) - Based on Stephen King's novella "Rita Hayworth and Shawshank Redemption," this film tells the story of Andy Dufresne's wrongful imprisonment and his friendship with fellow inmate Red.

4. The Lord of the Rings Trilogy (2001-2003) - Directed by Peter Jackson, this epic fantasy series adapts J.R.R. Tolkien's beloved novels, following Frodo Baggins and his companions on a quest to destroy the One Ring.

5. Gone with the Wind (1939) - This adaptation of Margaret Mitchell's novel is a sweeping historical romance set against the backdrop of the American Civil War and Reconstruction era.

6. One Flew Over the Cuckoo's Nest (1975) - Jack Nicholson stars in this adaptation of Ken Kesey's novel, portraying a rebellious patient in a mental institution who challenges the oppressive authority of Nurse Ratched.

7. The Silence of the Lambs (1991) - Based on Thomas Harris's novel, this psychological thriller follows FBI trainee Clarice Starling as she seeks the help of incarcerated cannibalistic serial killer Hannibal Lecter to catch another serial killer.

8. Schindler's List (1993) - Steven Spielberg's adaptation of Thomas Keneally's novel tells the true story of Oskar Schindler, a German businessman who saved the lives of over a thousand Polish Jews during the Holocaust.

9. Jurassic Park (1993) - Directed by Spielberg and based on Michael Crichton's novel, this sci-fi adventure explores the consequences of cloning dinosaurs for a theme park.

10. The Great Gatsby (2013) - Baz Luhrmann's adaptation of F. Scott Fitzgerald's novel captures the glamour and tragedy of the Jazz Age, focusing on the enigmatic Jay Gatsby and his obsession with Daisy Buchanan.

11. Forrest Gump (1994) - Adapted from Winston Groom's novel, this film follows the life of Forrest Gump, a simple-minded but kind-hearted man who inadvertently becomes involved in major historical events.

12. Fight Club (1999) - Directed by David Fincher and based on Chuck Palahniuk's novel, this film explores the nihilistic worldview and underground fight club culture of its unnamed protagonist.

13. A Clockwork Orange (1971) - Stanley Kubrick's adaptation of Anthony Burgess's dystopian novel delves into themes of free will, violence, and societal control through the story of Alex DeLarge and his experiences with state-sponsored rehabilitation.

14. The Shining (1980) - Another Stephen King adaptation, this horror film directed by Kubrick follows Jack Torrance as he becomes the winter caretaker of the Overlook Hotel and descends into madness.

15. The Green Mile (1999) - Based on Stephen King's serialized novel, this film tells the story of a Louisiana death row supervisor's encounters with an enigmatic inmate with supernatural abilities.

16. No Country for Old Men (2007) - Directed by the Coen brothers and based on Cormac McCarthy's novel, this neo-western crime thriller follows a Vietnam War veteran who stumbles upon a drug deal gone wrong and the relentless hitman tracking him.

17. The Girl with the Dragon Tattoo (2011) - Adapted from Stieg Larsson's novel, this film follows journalist Mikael Blomkvist and hacker Lisbeth Salander as they investigate a decades-old disappearance.

18. The Godfather Part II (1974) - Coppola's sequel to "The Godfather" continues the saga of the Corleone family, intertwining the story of young Vito Corleone's rise to power with Michael Corleone's struggles to maintain control.

19. The Curious Case of Benjamin Button (2008) - Based on F. Scott Fitzgerald's short story, this film follows a man who ages backward, experiencing life in reverse while encountering love, loss, and the passage of time.

20. The Martian (2015) - Ridley Scott's adaptation of Andy Weir's novel follows astronaut Mark Watney's struggle for survival after being stranded on Mars, blending elements of science fiction, humor, and human resilience.

These adaptations vary in genre, style, and themes, offering a diverse selection of films to explore based on some of the greatest novels in literature.