While it could happen in any genre, there's something special about a beloved book making its way to the screen. From Netflix's latest A Good Girl's Guide to Murder, which just released Season 2, to Project Hail Mary, which became a sci-fi sensation after its cinematic release on March 20, 2026, book adaptations have become prime source material in Hollywood. After all, not only do they ensure a more fleshed-out story with layered, complicated characters, but they usually come with a wave of loyal readers eager to see the story come to life too.