Is Fourth Wing a YA book?
The publisher record answers the classification question directly. Red Tower Books lists Fourth Wing under New Adult and Fantasy, identifies it as Empyrean Book 1, and gives ISBN 9781649374080. Shelf Checkout reports that publisher classification without turning it into a separate age verdict.
What age rating does Fourth Wing have?
Common Sense Media assigns 16+ to Fourth Wing, 17+ to Iron Flame, and 17+ to Onyx Storm. Those ratings belong to Common Sense Media. The publisher's New Adult label and content warnings are separate records.
The three published Empyrean novels
Red Tower Books identifies Fourth Wing and Iron Flame as Books 1 and 2. Rebecca Yarros identifies Onyx Storm as Book 3. The publisher's official Onyx Storm FAQ says five books are planned for the Empyrean series. This guide covers the first three published novels and does not infer content for Books 4 and 5.
Content by book
- Fourth Wing The publisher content warning lists war, battle, hand to hand combat, blood, intense violence, brutal injuries, death, poisoning, graphic language, and sexual activities shown on the page. Common Sense Media assigns 16+ and reports explicit sexual content, fantasy violence, strong language, wine, and a smoked substance.
- Iron Flame Red Tower Books identifies it as Empyrean Book 2 and retains the New Adult and Fantasy labels. Common Sense Media assigns 17+ and reports explicit sexual content, frequent strong language, combat deaths, torture, drugging, and alcohol.
- Onyx Storm The author's official page identifies it as Empyrean Book 3 and lists war, blood, intense violence, brutal injuries, death, poisoning, graphic language, and sexual activities shown on the page. Common Sense Media assigns 17+ and reports explicit sexual content, strong language, war violence, gore, and alcohol.
What changes after Book 1?
The attributed rating moves from 16+ for Book 1 to 17+ for Books 2 and 3. Common Sense Media reports torture and drugging in Book 2, while its Book 3 review reports continuing war violence, decapitation, explicit sexual content, and strong language. The cited records show changes in individual categories, not a Shelf Checkout rating for the series as a whole.
Make the call for your reader
Age ratings give you a starting point. The details above show what is in each book. The Shelf Checkout app compares those details with the sensitivity settings you choose for your reader, so you can decide whether the book fits your family. If you are looking at the whole series, use the series guide to see how the content changes from one book to the next.
