Months, maybe even years, have been invested in crafting your novel or memoir, and now you have decided to adapt it into a screenplay.
This might seem like an easy task at first since you already have a story to work with. You might think all you need to do is adapt the text into a screenplay format, but this is far from true. (You can learn more about screenplay formatting here.) The adaptation of a book into a screenplay is not about simply putting words into another context, but rather building the story anew.
In this article, I’ll walk you through how to adapt a book into a screenplay, whether you’re working from a novel or a memoir. I’ll look over what needs to change, what should stay the same, and how to avoid some common adaptation mistakes. Lastly, I’ll give you a Story Weapon you can use to strengthen your adaptation before you write a single scene.
Learning how to adapt a book into a screenplay begins with accepting that faithfulness to the source material is not the goal — serving the audience is. Novels carry subplots, interior monologue, and large casts that film cannot sustain, while memoirs contain messy, non-cinematic truths that must be restructured around a single visible transformation, making adaptation less a process of transcription and more one of purposeful reinvention.
The agony and the ecstasy
Writers are often surprised to discover that an accurate and faithful adaptation of a book usually proves to be a poor one.
Novice adapters will often try to maintain everything: subplots, the full cast of characters, dialogue, and even structure. However, novels and films work according to different principles.
Books can devote several pages to describing what characters are thinking about. In film, you can’t just have your protagonist sit there with an ongoing voiceover. You have to convey the same message through their actions, dialogue, and visuals. Novels are often very long. They can be 100,000 words or more. Screenplays are typically 90 to 120 pages long with each page correlating to a minute of screen time.
The challenge in adapting a book into a screenplay is distilling the story to its essence, and finding ways to dramatize experience.
How to adapt a novel into a screenplay
Novelists usually face one major problem: there’s too much material. A novel can comfortably support multiple storylines, several points of view, and a large cast of characters. But a movie can’t do that in quite the same way. Even 3-hour movie adaptations don’t include everything from their source material. That’s why novel adaptations can be quite difficult.
The goal with a movie adaptation is to find ways to advance the narrative with each subsequent scene so that the story is building in meaning as it progresses. There is an adage among screenwriters to “come into the scene as late as possible and get out as early as possible.” This principle does not apply to novels or memoirs. Reading is a very different experience, and while film is about dramatizing action, literature is often about conveying an inner experience.
Here are the steps to get started.
Identify the main character’s journey
Novels might devote whole chapters to side characters and subplots. For screenplays, there should be one strong emotional arc that drives the film. You need to get down to the core dilemma of your main protagonist.
If there are multiple main characters, asking questions like “Whose story is this?” and “Who has transformed the most in this story?” will help you discover the main protagonist.
Cut subplots ruthlessly
This is where many adaptations struggle. Writers become emotionally attached to side stories because they worked well in the novel.
The problem is that screen time is limited. A subplot that takes thirty pages in a novel may require twenty minutes of a film. That’s a lot of time taken away from the main storyline.
Ask yourself:
- Does this subplot strengthen the protagonist’s journey?
- Does it increase conflict?
- Does it support the central theme?
If your answer to these questions is no, then it might be helpful to cut it. Some of the best screenplay adaptations remove entire storylines. The movie becomes stronger because of it.
Combine characters when necessary
Novelists often create large supporting casts. Films frequently streamline them.
- Two minor characters might become one.
- Three mentor figures such as a parent, a teacher, and a coach might be condensed to focus on the mentor relationship that relates to the central dilemma most.
- Even several antagonists might merge into one stronger opponent.
This is what adaptation is all about. A story that is clear, concise, and engaging will be more successful than one that focuses on getting tiny details from the book exactly right and sacrifices the momentum to hold the audience’s interest.
Turn internal conflict into visual conflict
This may be considered the most crucial adaptation skill a writer needs to learn. While books are great at telling an internal story, movies are great at telling a visual story.
For instance, let’s say you have a character who suffers from low self-esteem. In a novel, the entire chapter might explore their doubts and fears, while in a screenplay, you must find ways to dramatize that struggle quickly through action and dialogue.
Rebuild the story structure
One of the biggest mistakes novelists make is trying to adapt chapter by chapter.
Screenplays don’t care about chapters. They care about dramatic momentum. Your job is to build a fresh outline from scratch. Here’s more information on how to outline your screenplay.
Think of your screenplay as a new version of the same story, a retelling rather than simply a shortened version.
“Your debt is not to the original material, but to the audience watching (and paying for) the movie.”
– William Goldman
How to adapt a memoir into a screenplay
Memoir adaptation requires a completely different approach. Novelists have too much material. Memoir writers often have too much reality. And reality doesn’t always behave like a movie.
The truth is, life is messy. Important events happen randomly. Growth occurs slowly. Transformations rarely fit neatly into 90 minutes. That’s why adapting a memoir requires you to become both a storyteller and the editor of your own life.
Sounds a bit overwhelming? Maybe. But can it be done? Definitely. Let’s dive in.
Find the central transformation
Most memoirs contain dozens of meaningful experiences. But your screenplay needs to focus on one primary transformation.
Ask yourself:
- What changed?
- What is different about the protagonist (you) at the end of the story?
Maybe you overcame addiction, rebuilt a relationship, discovered your purpose, or survived something that changed how you see yourself forever.
That transformation becomes the backbone of the screenplay. Everything else should support it.
Choose the story, not the timeline
Many memoirists believe they must capture each event verbatim. Why? These are personal experiences. They’re true. But screenwriting is not about recording the facts. Screenwriting is about storytelling. And that means that there could be a combination of events. You could shorten the timeline. A few different events could turn into one dramatic scene.
As long as you’re staying true to the experience, you’re respecting the memoir in its own right.
Look for cinematic moments
Not every meaningful memory belongs in a movie. Some experiences matter because of what they taught you. Others matter because they’re inherently dramatic.
Your screenplay needs both, but it relies heavily on the second category.
Ask yourself:
- What moments would people want to watch?
- What scenes contain the most tension?
- What events changed everything?
- What memories still feel vivid years later?
Those moments usually deserve priority.
Strengthen external conflict
This is where memoir adaptations often become challenging. Many memoirs focus on internal growth. While that’s wonderful for a book, a film needs visible obstacles. If your memoir explores anxiety, grief, identity, or recovery, ask:
- What external situations reflected those struggles?
- Who challenged you?
- What stood in your way?
- What consequences existed?
The stronger the external conflict, the easier it becomes for audiences to connect with the internal journey.
Tips for getting started
Structure is your friend
Some writers fear that by following structure they will be inauthentic. Structure does not affect the truth of an experience. Structure helps you communicate that truth. A screenplay still requires obstacles, crises, climaxes, and resolutions. Here’s another quote from William Goldman, one of the great screenwriters of the twentieth century: “Screenplays are structure.”
In order to adapt a book into a film that captures your audience’s attention, you must create an outline. Story structure allows your audience to connect emotionally to your story.
Read other screenplays
This is one of the easiest things that you can do if you’re trying to adapt something successfully. Read produced screenplays to see how scenes move in that format. You will learn how quickly certain types of information can be presented. You will notice how things get done visually.
You’ll start thinking in terms of scenes rather than chapters.
Writing dialogue for the screen
When a writer tries to recreate dialogue verbatim from the book, it rarely works. While it may work in some cases, it must be distilled and contextualized in order to translate to the screen.
When revising your dialogue, ask:
- Does this sound natural?
- Does it move the scene forward?
- Could some of this information be shown instead?
Common Adaptation Mistakes
- Trying to include everything: You don’t get extra points for loyalty. The best adaptations make difficult choices.
- Relying too heavily on voiceover: Voiceover can be useful. It shouldn’t carry the entire screenplay.
- Protecting every character: Some characters need to disappear. Others need to merge. That’s part of the process.
- Following the book too closely: The screenplay should serve the movie, not the book’s manuscript.
- Forgetting the visual nature of film: If the audience can understand something by watching it happen, don’t explain it. Show it.
Your story weapon: The scene justification test
When you’re deciding whether or not a scene belongs in your screenplay, ask yourself one simple question:
“If I removed this scene entirely, would the movie still work?”
If the answer is yes, the scene isn’t earning its place.
Every scene should accomplish something important. It should reveal character, increase conflict, deliver new information, or create emotional movement.
Ideally, it does more than one of those things at the same time. Run every scene through this test as you write your first screenplay draft. You’ll quickly discover which moments truly belong in the movie and which belong only in the book. And when you’re adapting a story, that’s one of the most valuable skills you can develop.
Writing the screen adaptation of a book is not about reproducing the work faithfully. It’s about reinventing it. You don’t have to retain each page of the original or every experience that comes with reading it.
Whether you’re adapting a novel or a memoir, you need to do one thing — figure out the emotional core of your story and craft a powerful screenplay around it.
Some things will get cut along the way, but that’s perfectly fine. That’s how adaptation works. What distinguishes successful from unsuccessful adaptations is a willingness to remake the story for a new audience rather than protect every word.
Adapting a story for the screen requires a strong understanding of structure, character, and visual storytelling. To deepen your storytelling skills and learn how to shape compelling narratives across different forms, join one of my next workshops: The 90-Day Novel, The 90-Day Memoir, Story Day.
