Film based on a bestselling novel or book — requires translating internal monologue to visual language and compressing hundreds of pages into 90 minutes. High commercial stakes.
When you adapt a novel, you're not working with the novel itself—you're working against it. The inner world of a book, which lives for a hundred pages through stream of consciousness and flashbacks, must be translated into two hours of image, sound, and editing. This is not illustration; it's re-creation. The director of a literary adaptation sits between two masters: the original text and the audience, who have already filmed that text in their minds.
The first decision is radical: what stays, what goes? A 600-page novel has approximately 100,000 words of inner monologue, description, and temporal jumps. The editing must be brutal—not out of malice, but because film speaks a different grammar. While a book gives you 15 pages to explore a character, on set you need three glances, a hand gesture, a cut back to the face. You learn not to tell character development, but to show it. This often means cutting dialogue, merging scenes, or—and this is the hardest part—inventing new scenes that don't exist in the original because the medium demands it.
The Trap of Fidelity: Fandoms of bestsellers expect faithfulness to the original. That's a mistake. The most successful adaptations (and here I speak from set experience with projects of varying sizes) are those that preserve the spirit of the novel, not every subplot. You are allowed to retell the story. You must, in fact. A book tells through language; a film tells through images—these are incompatible media that only fit together through a courage for difference.
Practically, this means: read the novel three times. Once for the story, once for the atmosphere, once to note what you want to forget. Talk to the screenwriter early about cuts. Not all supporting characters need screen time. Sometimes a montage replaces ten dialogue scenes. And on set itself—pay attention to the moments the novel doesn't have, but that only film can create: a glance in a mirror instead of a page of inner monologue, a shot without words that carries more weight than an explanatory scene. This is where literary adaptation becomes an art form.