TL;DR
The "BookTok" algorithm doesn't care about age ratings. Many viral books with "pretty" covers (like A Court of Thorns and Roses or Fourth Wing) are actually New Adult or adult erotica. If you see a "pepper scale" (🌶️) in a review, it’s a warning about sexual content.
Quick Links for Safe Alternatives:
- For Romance fans: Divine Rivals by Rebecca Ross (Ages 13+)
- For Fantasy fans: The Cruel Prince (Ages 14+)
- For Younger Readers: Keeper of the Lost Cities (Ages 10+)
- Check out our guide: How to decode BookTok slang
If you’ve walked into a Barnes & Noble lately, you’ve seen the "BookTok Made Me Buy It" table. It’s filled with gorgeous hardcovers featuring sprayed edges, gold foil, and dragons. To a parent, these look like the natural next step after Harry Potter or Percy Jackson.
But there’s a massive shift happening in publishing called "New Adult" (NA). This category sits between Young Adult (YA) and Adult. While YA usually caps out at some heavy kissing or "fade-to-black" scenes, New Adult—specifically the "Romantasy" (Romance + Fantasy) subgenre—often features explicit, graphic sexual content that would earn an R-rating or worse in a movie theater.
The problem? The TikTok algorithm serves these books to anyone interested in "fantasy," regardless of whether they are 13 or 30. Your middle schooler might see a "cool dragon book" edit and have no idea they’re about to read something written for a bachelorette party.
When kids and influencers talk about books online, they use a "spice scale" to rate sexual content. It’s usually measured in chili peppers (🌶️).
- 1 Pepper: Mild. Hand-holding, maybe one "open-door" kissing scene.
- 2-3 Peppers: Moderate. Explicit descriptions, but they don't dominate the plot.
- 4-5 Peppers: High Spice. This is effectively erotica. The plot is often secondary to the sexual encounters.
If your kid is asking for a book and the reviews mention "4 peppers" or "high spice," that’s your signal that this isn't The Hunger Games.
Ask our chatbot for a "spice-free" reading list for your teen
Let’s get specific. Here are the titles currently trending that often catch parents off guard.
This is the "gateway drug" of BookTok. It starts off feeling like a Beauty and the Beast retelling. By book two and three, it is explicitly adult. We aren't talking about "tension"—we are talking about multi-page, graphic descriptions. While many 16-17 year olds read this, it is frequently found in the hands of 12-year-olds who just liked the cover. Verdict: 17+ only.
Dragons! War college! It sounds like the perfect Zelda or How to Train Your Dragon follow-up. It isn’t. This book is the definition of "Romantasy." The sexual content is graphic and frequent. It’s a fun read for adults, but for a middle schooler? It’s a lot. Verdict: High school and up, with a "know your kid" caveat.
This one is especially tricky. The cover looks like a cute, cartoonish rom-com—very similar to the style of The Love Hypothesis. It’s about a figure skater and a hockey player. Parents see the "cute" cover and think it’s a teen romance. It is not. This is a very "spicy" adult contemporary romance. Verdict: Definitely not for kids.
Check out our guide on why "cute" book covers are often misleading
You don't want to be the "no books" parent. Reading is great! Here are the viral hits that actually fit the "Young Adult" or "Middle Grade" labels.
This is the gold standard for "clean" viral books right now. It has the romance and the magical stakes, but it stays firmly in the YA lane. It’s beautiful, emotional, and won’t leave you having a very awkward conversation about "pepper scales." Ages: 13+
This is currently huge on TikTok. It’s a fantasy "enemies-to-lovers" story that feels a bit like The Hunger Games meets Red Queen. There is plenty of romantic tension (the "slow burn" kids love), but it remains age-appropriate for teens. Ages: 14+
If your kid wants "fae" stories like ACOTAR, give them this. It’s darker, more political, and much more focused on the fantasy world than the bedroom. Holly Black is the queen of YA faerie lore. Ages: 14+
For the 10-12 crowd who wants a long series to obsess over. It’s got the "chosen one" vibes, telepathy, and a great ensemble cast. It is 100% safe and 100% addictive. Ages: 10-13
Back in the day, if a book was in the "Teen" section of the library, a librarian had vetted it. Today, your kid is getting recommendations from Instagram Reels and TikTok creators who are often 25-year-old women. These creators aren't "reviewing for parents"—they are reviewing for their peers.
When a 13-year-old sees a video with 1 million likes saying "This book destroyed me, I'm obsessed," they don't realize the creator is obsessed with the adult themes, not just the plot.
Community Data Note: We’ve seen a 40% increase in parents asking about "New Adult" titles in the Screenwise community over the last year. Most parents are surprised to find that "Young Adult" as a category has been stretched to include content that was previously considered strictly for adults.
You don't have to be the "Book Police." Instead, try being a "Book Consultant."
- The "Check the Tags" Rule: Teach your kid to look up a book on The StoryGraph or Common Sense Media before they buy it. Show them how to look for "content warnings."
- The "Cover is a Lie" Talk: Explain that publishers use "cute" or "fantasy-style" covers to sell books to everyone, but that doesn't mean the content is for everyone.
- Read Together: If they really want to read a "borderline" book like Fourth Wing, offer to read it at the same time. It gives you an opening to discuss the themes (and skip the parts that are too much).
- Use the "Pepper" Language: Ask them, "Hey, what’s the spice rating on that one?" It shows you’re in the loop and not just judging from a distance.
It is awesome that kids are reading again. BookTok has done more for literacy than almost any other digital trend. But as parents, we have to realize that the "Book" world has adopted the same "attention economy" as YouTube and Roblox.
Just because a book is viral doesn't mean it’s YA. Just because it has a dragon doesn't mean it’s for kids. A quick 30-second search on the "spice level" can save you a lot of headache (and a very weird conversation) later.