We have detailed book-by-book content guides for each of these series. This post pulls from those guides to put the series side-by-side. Each section covers one content category. The series appear in rough order from lighter to heavier within each category.
Two notes before we start: First, "lighter" and "heavier" here are descriptive, not evaluative. They describe how much of a given content category is present. Second, ACOTAR (A Court of Thorns and Roses) and the Empyrean series (Fourth Wing) are New Adult, not Young Adult. They're included here because they show up in the same conversations and the same feeds as the YA titles, but they're a meaningfully different category.
Series in This Comparison
- Harry Potter (J.K. Rowling, 7 books, YA/MG) Full guide
- Percy Jackson (Rick Riordan, 5 books + Heroes of Olympus, YA/MG) Full guide
- Wings of Fire (Tui T. Sutherland, 15 books, MG) Full guide
- Divergent (Veronica Roth, 3 books + novella, YA) Full guide
- The Hunger Games (Suzanne Collins, 5 books, YA) Full guide
- ACOTAR (Sarah J. Maas, 5 books, New Adult) Full guide
- Empyrean / Fourth Wing (Rebecca Yarros, 3 books published, New Adult) Full guide
Violence
Wings of Fire: Dragon battles and injuries with some deaths. Portrayed without lingering graphic detail. Combat is a regular story element but descriptions stay within middle grade conventions.
Harry Potter: Early books have minimal violence. Books 4 through 7 include deaths, battle sequences, and torture scenes (the Cruciatus Curse). Book 7 is a full war narrative with significant casualties. Violence escalates meaningfully across the series.
Percy Jackson: Consistent action and combat across all 5 books, including monster battles and character injuries. Deaths occur, including significant character deaths in the later Heroes of Olympus series. Descriptions are more stylized than graphic; the overall tone stays adventurous.
Divergent: Training deaths and combat from Book 1. The initiation sequences in Dauntless involve physical fights where participants are seriously injured or killed. Allegiant (Book 3) includes a major character death that many readers found shocking. Violence is a consistent element across all three books.
The Hunger Games: The premise requires children to kill each other. Deaths are described with specificity. Mockingjay (Book 3) is a full war novel with civilian deaths, torture, and psychological trauma woven throughout. The violence is integral to the story's themes and more sustained than any other traditional YA series on this list.
ACOTAR: Graphic violence increases across the series. Later books depict torture in detail. Combat sequences are frequent and visceral. Book 2 (ACOMAF) onward includes more explicit violence than the first book.
Fourth Wing / Empyrean: Graphic violence is a constant from Book 1. The war college setting means deaths in training, battle, and dragon attacks. Torture becomes a plot element in Book 2. The violence is detailed and frequent throughout.
Romance and Sexual Content
Harry Potter: Minimal. Crushes, a few brief kisses. No physical description of romantic encounters.
Wings of Fire: Minimal romance overall. Starting in Arc 2 (Book 8), the series includes same-sex dragon relationships presented at the same intensity as straight pairings in the series. Parents who want to know before their child encounters it: it begins in Book 8.
Percy Jackson: Slow-burn romance between Percy and Annabeth across 5 books. A kiss in Book 3, a more significant kiss in Book 5. No sexual content.
Divergent: A slow-burn romance between Tris and Tobias (Four). Kissing and physical closeness increase across the series. Allegiant (Book 3) includes a scene where the couple is described as physically intimate, though it is not explicitly detailed. No explicit sexual content.
The Hunger Games: A love triangle between Katniss, Peeta, and Gale. Physical affection is present but not described in detail. No sexual content.
ACOTAR: Book 1 has mild-to-moderate romantic content. Book 2 (ACOMAF) introduces explicit sexual content that continues and intensifies through Books 3-5. Multiple explicitly described sexual encounters per book in the later installments.
Fourth Wing / Empyrean: Two extended explicit sex scenes in Book 1. Multiple explicit encounters in Books 2 and 3. The series is frequently described by readers as "spicy," a term indicating significant sexual content. This is New Adult fiction, not YA.
Language
Wings of Fire: No profanity. Dragon insults and mild exclamations.
Harry Potter: Mild British profanity ("bloody hell," "damn"). No strong language.
Percy Jackson: Mild profanity. The word "hell" used as an exclamation in context. No strong language.
Divergent: Mild profanity throughout. A few uses of stronger language in high-tension moments. Generally restrained compared to heavier YA.
The Hunger Games: Mild-to-moderate profanity. Stronger language appears in the later books, especially Mockingjay.
ACOTAR: Moderate profanity in the early books, strong profanity in later installments. Includes the f-word in later books.
Fourth Wing / Empyrean: Strong profanity throughout all three books. The f-word is used frequently.
Death and Grief
Wings of Fire: Deaths occur, including significant character deaths in later arcs. Handled with some emotional weight but within middle grade conventions.
Harry Potter: Minor character deaths in early books. Significant deaths become a regular feature from Book 4 onward: Cedric, Sirius, Dumbledore, and major casualties in the Battle of Hogwarts. Grief is a central theme of Books 5-7.
Percy Jackson: Character deaths occur, including in the Heroes of Olympus follow-up series. The stakes escalate significantly in Books 4-5 of the original series.
The Hunger Games: Character deaths from the first pages. Major deaths accumulate across the series. The cost of war and the grief it produces are central to what the series is doing, especially in Mockingjay.
Divergent: Significant deaths beginning in Book 1. Allegiant (Book 3) contains one of the most discussed character deaths in YA fiction. Death and sacrifice are recurring themes.
ACOTAR: Character deaths and significant losses throughout. Trauma and grief are recurring elements, especially in the later books.
Fourth Wing / Empyrean: Deaths are frequent, beginning in training sequences in Book 1. The series maintains high stakes throughout.
Themes and Tone
Wings of Fire: Identity, belonging, and friendship. Themes around prejudice and conflict resolution. Middle grade tone throughout.
Harry Potter: Good vs. evil with increasing moral complexity. Death, sacrifice, and the corrupting effect of power become central in the later books. Tone lightens for Books 1-3, darkens significantly for Books 4-7.
Percy Jackson: Identity, belonging, and found family. Greek mythology as a lens for contemporary family dynamics. Tone stays generally adventurous and hopeful even in darker moments.
Divergent: Identity, conformity, and the dangers of rigid social structures. Political corruption and the ethics of governance become central in Books 2 and 3. The series asks harder questions about ideology and violence than its YA contemporaries.
The Hunger Games: State violence, trauma, and the cost of resistance. Moral complexity increases with each book. Katniss is not a clean hero. The series engages with propaganda, PTSD, and what survival actually costs.
ACOTAR: Fantasy romance with themes around power, autonomy, and trauma recovery. Later books expand to political conflict and war.
Fourth Wing / Empyrean: War ethics, loyalty, and political deception against a fantasy backdrop. The romantic relationship is a central driver of the narrative. Content intensity is high throughout.
Quick Reference
For deeper detail on any series, each one has a full book-by-book content breakdown. The Fourth Wing guide, ACOTAR guide, Hunger Games guide, Harry Potter guide, and Percy Jackson guide each cover content book by book, including how intensity changes across the series.