What reading level is Hello, Nebulon!?

Hello, Nebulon! by Ray O'Ryan is at a Level 3 reading level (Lexile 580L). Recommended for Lower Grades readers (Ages 5-8).

What age is Hello, Nebulon! appropriate for?

Hello, Nebulon! is recommended for Ages 5-8. HootRating: 8LE (Light — Emotional).

What genre is Hello, Nebulon!?

Hello, Nebulon! is fiction — Juvenile Fiction.

Does Hello, Nebulon! have any content warnings?

Hello, Nebulon! has a HootRating of 8LE (Light — Emotional). No specific content flags noted. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is Hello, Nebulon!?

Hello, Nebulon! by Ray O'Ryan is 128 pages.

Reviewed by HootRated editorial · Last updated September 7, 2026

Hello, Nebulon!

Ray O'Ryan

Hello, Nebulon!

Age Rating, Reading Level & Content Guide

by Ray O'Ryan

Reading Level 3 8LE Ages 5-8 Balanced Read

The text is written at a 3rd grade reading level, the subject matter is intended for younger children (ages 5–8), and the content is gentle with no concerning themes.

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About This Book

What would you do if your new home was a whole different planet? Zack just moved from Earth to Nebulon, a place full of shiny buildings and strange creatures. How will he make friends when everything feels so new and unknown?

Themes

Science & Nature Friendship Family Adventure

Quick Assessment

This early reader follows eight-year-old Zack as he adjusts to life on the futuristic planet Nebulon in the year 2120. The story gently explores themes of moving, starting school, and making new friends, making it suitable for young children aged 5-8 who may be experiencing similar transitions. There is no intense content, and the science fiction setting introduces imaginative elements in an accessible way.

Why we rated Hello, Nebulon! 8LE

Hello, Nebulon! is written at a Level 3 reading level with a Lexile measure of 580L across 128 pages. Strong independent readers around grade 4.0 can typically handle this book on their own; with parent or teacher support, Hello, Nebulon! works for readers up to grade 5.0.

We rate Hello, Nebulon! as 8LE ("Light — Emotional") because the content sits in the "Gentle" range — no conflict beyond everyday childhood experiences. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly gentle; no single dimension stands out as a concern.

No specific content flags were raised by community reviewers, which is consistent with the gentle intensity score.

Thematically, Hello, Nebulon! explores science & nature, friendship, family, and adventure — these threads give the book room to mean different things to different readers.

Good fit for

✓ Children in the Ages 5-8 range — the maturity and attention span match the story's pacing.
✓ Patient readers who enjoy slower, character-driven stories.
✓ Kids drawn to stories about science & nature, friendship, family.