Write it for them.Not down to them.

What makes a book young adult

Young adult is less a genre than an audience. A YA book can be a fantasy, a thriller, a romance or a quiet contemporary story, but it is usually told by a teenager, close to their experience, at the moment their world is changing. The voice tends to be immediate, and the stakes feel total because, at that age, they are.

That means YA writers make two kinds of decision on every page. The story ones, which every writer makes, and the audience ones: is this scene for a fourteen-year-old or an eighteen-year-old, how much violence or romance belongs on the page, and does the narrator sound like a teenager or like an adult remembering being one.

The age of the protagonist sets a lot of this. Younger YA tends to sit around fourteen or fifteen, with first crushes, family and friendship at the centre; upper YA reaches toward eighteen, with more on the page and choices that look like adulthood. Middle grade sits below both. Knowing which shelf you are writing for early saves a painful revision when an editor asks you to age the cast up or down.

Set the audience and the boundaries first

Foundations, Authrot’s planning steps, include two fields that YA writers tend to fill first: who the book is for, and what it will and won’t show on the page. Write them in your own words, such as readers of fourteen and up, or no on-page sex and little swearing, and anchor them. Anchored fields are never redrafted, and the Co-writer checks every suggestion against them.

If you draft with the assistant, writing rules hold on every line it writes: must, should, avoid and never. A YA writer might add “never describe gore in detail” or “avoid adult slang that dates the book”, and the same rules are checked when chapters are read. Nothing the assistant writes touches your text until you apply it.

• Who it’s for, in your own words
• Content boundaries: what the page will and won’t show
• Anchors the Co-writer never redrafts
• Writing rules held on every line the AI writes

Does it read as YA?

Read the prose gives an AI read of a chapter, with the cost shown first: point of view, tense, tone, pacing, and the reading level, described in plain words such as adult, young adult or middle grade. If a chapter you meant for teen readers comes back reading as adult, that is worth knowing before an agent or editor tells you.

Prose stats measure each chapter without the AI and at no cost: sentence length, dialogue share, -ly adverbs, the words you lean on, and reading time. YA often runs on dialogue and short, punchy paragraphs, and seeing the dialogue share chapter by chapter shows you where the book slows down into narration.

A narrator who sounds their age

The most common note on a YA manuscript is that the narrator sounds too old: too reflective, too wry about their own mistakes, too fond of words no sixteen-year-old would reach for. The fix is usually not slang, which dates quickly, but rhythm and attention: what a teenager notices first, what they refuse to say out loud, and how fast their feelings change within a scene.

Twelve voice templates tell the same scene twelve ways, including a wry first person and a present, immediate voice that suit a lot of YA, so you can hear the difference before you commit. Keep voice samples, passages of your own that sound exactly right, and chapters that read unlike them are flagged as drifting. The cast check flags names every AI favours, as well as names in your cast that start or look alike.

A cast of friends, rivals and parents

YA casts are crowded: a friend group, a love interest or two, a rival, siblings, teachers and parents who need to be absent at the right moments. Screen time shows who is in every chapter and whose point of view it is told from, and the story bible keeps each person’s traits, aliases and nicknames, with every mention in reading order.

Connections draw the ties as the chapters describe them: friends, family, romance, rivals. Slide to any chapter to see the ties as they stood then, so the falling out in chapter eighteen doesn’t leak into chapter six. For a contemporary cast, a naming style can draw real names as common as they were for people born in a given decade, from national records such as the United States, England and Wales, or Spain.

Parents and teachers are the cast members YA writers forget. They need to be absent for the plot to work, but a reader notices when a mother disappears for twelve chapters without a word. Characters who have gone quiet too long are flagged as due back, which is a gentle prompt to give the absence a reason on the page.

Writing it where you are

Plenty of YA authors write on a phone, between classes or on a commute. Authrot is a web app that installs to your desktop or home screen and works on a phone with the same editor, a floating dock and bottom sheets. If you lose signal, edits stay in the tab and sync when you reconnect.

When the book is ready for readers, publish it under a pen name. Readers never see your real name or email, and you can keep a story unlisted and share it by link only. Set the rating to teen, answer the content warnings, and readers can choose light, sepia or dark, and the typeface, size and spacing that suit them, including dyslexia-friendly fonts.