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Quick answer: By Your Side is best for readers aged 12 and up. It is a clean, sweet teen romance about two teens accidentally locked in a library, with mild language and themes of anxiety.
Quick facts
– Book: By Your Side by Kasie West (2017)
– Format: Young adult romance
– Suggested starting age: 12 and up
– Best for: families checking whether the book fits their child's age and maturity
Parents search for the right age for By Your Side because age labels on a cover rarely tell the whole story. A child's age is only one clue. Reading level, maturity, sensitivity to certain topics and whether a parent will read along all matter. This guide gives a clear age range, a content breakdown and a few ways to decide for your own child. Use the table and checklist below as a starting point, then adjust for what you know about your child's temperament, reading experience and sensitivity.
Table of Contents
Age-by-Age Guide to By Your Side
| Age | What to expect |
|---|---|
| 10 to 11 | Possible for readers who enjoy romance. |
| 12 to 14 | A good fit. |
| 15 to 17 | Ideal. |
| Adults | A light, quick read. |
What Is By Your Side About?
Autumn Collins is accidentally locked in her local library over a long holiday weekend. She is not alone: Dax Miller, a boy with a troubled reputation, is trapped too. With no phones or way out, they get to know each other. Autumn hides her anxiety disorder from most people, and Dax hides his own pain. When they finally leave, Autumn must decide whom she really cares about.
Start with By Your Side by Kasie West if your child is in the suggested range.

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Content Guide for Parents
| Topic | What to know |
|---|---|
| Violence | None. |
| Language | Very mild. |
| Romance and sex | Kissing only. |
| Scary content | None. |
| Drugs and alcohol | None. |
| Positive messages | Honesty, mental health awareness and seeing past reputations. |
Is By Your Side Okay for a Younger Child?
The book is clean and suits many younger readers, though the romance is the main focus. Autumn's anxiety is shown realistically, which can help readers who have similar feelings.
What Parents Should Know Before Their Child Reads By Your Side
Kasie West is known for clean teen romances, such as The Distance Between Us and P.S. I Like You. By Your Side discusses anxiety and medication in a supportive way.
Why Age Recommendations Differ
Publishers, schools, libraries and review sites often give different age ranges for the same book. Publishers aim at the buying market, schools think about reading level and classroom discussion, and parents care most about content and maturity. If you are unsure about By Your Side, read a few pages, check a trusted review and trust what you know about your own child.
Reading Level, Length and Format
Before you buy, check the page count and the edition. Longer books with small print can feel harder than the age label suggests, and illustrated or abridged editions can bring a book within reach of a younger reader. Audiobooks and library copies are a low-cost way to try By Your Side first. If your child reads below the suggested level, reading aloud together is a good way to share the story without frustration.
Tips for Different Kinds of Readers
- Advanced young readers: A strong reader may be able to decode the words of By Your Side well before they are ready for its themes, so judge by maturity, not only by reading level.
- Reluctant readers: Offer the audiobook, take turns reading chapters, or watch for a good moment to stop and talk.
- Sensitive readers: Skim the content guide above and preview any chapters that may upset them.
- Older readers: Teens who read below the age range for fun can still enjoy the book, and a familiar story can be a comfortable break.
Is Your Child Ready? A Quick Checklist
- Can they read at a level close to the book's, or will they listen as you read aloud?
- Do they cope well with the themes listed in the content guide above?
- Do they like talking about stories, and will they come to you with questions?
- Have they read other books at a similar level and enjoyed them?
- Do they want to read this book, rather than feel pushed to?
- Are you able to check in after the first few chapters?
If you answered yes to most of these, your child is probably ready. If you answered no to several, it is fine to wait a year or choose a gentler book first.
A Simple Read-Together Plan
- Preview. Read the first chapter or a sample yourself so you know the tone.
- Read the first chapters together. Notice how your child reacts, and pause when something feels heavy.
- Check in. Ask what they think is happening and how they feel about the characters.
- Decide on independence. If it goes well, let them continue alone, and keep the conversation open.
If Your Child Wants to Read It Early
Curious children often ask for books before the suggested age. Rather than say no outright, offer a compromise: read the first chapters together, listen to the audiobook as a family or set a check-in after each section. That keeps By Your Side from becoming forbidden fruit while still letting you guide the experience.
Questions to Talk About After Reading By Your Side
- Which character did you understand best, and why?
- Was there a moment that surprised or worried you?
- What would you have done in the main character's place?
- What did the book teach you, if anything?
- Would you recommend it to a friend, and who would enjoy it most?
Similar Books to Try
- P.S. I Like You by Kasie West: a sweet romance through notes
- The Summer I Turned Pretty by Jenny Han: a summer love story
- Simon vs. the Homo Sapiens Agenda by Becky Albertalli: a funny teen romance
Frequently Asked Questions
What age is By Your Side appropriate for?
By Your Side is best for readers aged 12 and up. It is a clean, sweet teen romance about two teens accidentally locked in a library, with mild language and themes of anxiety.
Is By Your Side okay for a younger child?
The book is clean and suits many younger readers, though the romance is the main focus. Autumn's anxiety is shown realistically, which can help readers who have similar feelings.
Is it clean?
Yes, with only kissing.
Does it discuss anxiety?
Yes, Autumn has an anxiety disorder.
Should I read By Your Side before my child does?
It is a good idea to read the opening chapters or a summary first. That way you know the tone and can answer questions as they come up.
Can my child listen to By Your Side instead of reading it?
Yes. An audiobook is a good option for readers who are a little below the suggested age, because you can listen together and pause to talk.