Junie B. Jones Reading Level: Every Book, Lexile and ATOS

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Here's what you came for.

All 28 Junie B. Jones books sit between ATOS 2.6 and 3.1. Lexile runs 340L to 560L. Renaissance files every one of them at interest level K to 3.

Twenty-eight books. Twenty years. The difficulty barely moves.

But the books do change, a lot, and not in the direction you'd guess.

I'm Jimmy Vee. I write funny picture books and I've performed for kids for thirty years. Everything here comes from Renaissance Accelerated Reader BookFinder, the same database your school's AR program uses. Their numbers, not my guesses.

Junie B. Jones reading levels, all 28 books

# Title Year Lexile ATOS Words Pages
1 Stupid Smelly Bus 1992 520L 2.9 6,570 69
2 Little Monkey Business 1993 540L 2.9 6,603 68
3 Her Big Fat Mouth 1993 560L 3.0 5,509 69
4 Some Sneaky Peeky Spying 1994 540L 2.9 6,059 66
5 Yucky Blucky Fruitcake 1995 490L 2.7 7,459 71
6 That Meanie Jim's Birthday 1996 510L 2.8 8,103 85
7 Loves Handsome Warren 1996 500L 2.7 6,030 71
8 Has a Monster Under Her Bed 1997 460L 2.7 6,009 69
9 Is Not a Crook 1997 560L 3.0 5,434 67
10 Is a Party Animal 1997 530L 2.8 6,335 71
11 Is a Beauty Shop Guy 1998 480L 2.8 5,820 80
12 Smells Something Fishy 1998 510L 2.6 5,749 66
13 Is (Almost) a Flower Girl 1999 460L 2.7 6,351 68
14 Mushy Gushy Valentime 1999 560L 2.9 6,485 69
15 Has a Peep in Her Pocket 2000 560L 2.9 5,836 67
16 Is Captain Field Day 2001 520L 2.8 6,241 66
17 Is a Graduation Girl 2001 550L 3.0 6,622 69
18 (at Last!) 2001 490L 2.6 6,276 76
19 Boss of Lunch 2002 540L 2.8 6,986 77
20 Toothless Wonder 2002 510L 2.8 7,948 80
21 Cheater Pants 2003 340L 3.1 8,174 86
22 One-Man Band 2003 520L 3.0 7,830 87
23 Shipwrecked 2004 560L 3.1 8,022 88
24 Boo...and I Mean It! 2004 510L 2.9 7,723 86
25 Jingle Bells, Batman Smells! 2005 340L 2.8 11,197 118
26 Aloha-ha-ha! 2006 360L 2.8 11,350 119
27 Dumb Bunny 2007 410L 2.8 11,372 119
28 Turkeys We Have Loved and Eaten 2012 370L 2.9 12,523 134

Shaded rows are the First Grader books, 18 to 28.

Barbara Park wrote all of them. Denise Brunkus illustrated all of them. The series ended at 28.

The books double in size and get easier

This is the finding, and I had to check it twice.

Book 9 is 5,434 words.

Book 28 is 12,523 words.

The books more than double. Pages go from 66 to 134. A first grader finishing book 27 is reading almost twice the book a kindergartner finished in book 3.

Now look at the Lexile column while that happens.

The four lowest Lexile scores in the whole series are books 21, 25, 26 and 28. Three of those four are also the longest books Park wrote.

Book 25 is 11,197 words at 340L. Book 3 is 5,509 words at 560L.

The longer book measures easier. That is not a typo.

Why that happens, and why it's good news

Lexile counts two things. Sentence length and word frequency. That's it.

Junie B. narrates in her own voice, and her voice is short, wrong, and hilarious. "Wowie wow wow." Sentences that stop early. Words a six-year-old actually uses.

The further Park went into the series, the harder she leaned into that voice. Shorter sentences. Plainer words. More Junie B., less narrator.

So Lexile went down while the page count went up.

For a parent, that's about the best news in this whole article. Your reader gets a book that looks and feels substantially bigger without the sentences getting harder. That's exactly the on-ramp a kid needs between picture books and real chapter books.

First grade does not mean harder

Book 18 is Junie B., First Grader (at Last!). She changes grades, and the series name changes with her.

Plenty of parents read that as a step up in difficulty. It isn't.

Book 18 is ATOS 2.6. That's the joint lowest in the whole series, tied with book 12.

What changes at 18 is length, not difficulty. The kindergarten books average about 6,300 words. The First Grader books average about 9,000.

Longer, not harder. Same as everything else here.

One small thing worth knowing: book 28 is the only book in the series worth 2.0 AR points instead of 1.0. It's the longest. If your school runs on AR points, that's a two-for-one.

Watch the author on the graphic novels

There are now graphic novel adaptations, and they are not the same books.

They're adapted by Colleen AF Venable, not written by Barbara Park, and Renaissance gives them their own measures. The graphic novel of The Stupid Smelly Bus comes in at GN490L against the chapter book's 520L.

Same rule as always. Check the author. Park means chapter book. Venable means graphic novel.

What the number won't tell you

Reading level tells you whether a kid can decode the words. Nothing else.

It won't tell you that Junie B. narrates in first person with a mouth on her. That she calls things by the wrong name on purpose. That some grown-ups find her rude.

Plenty of teachers love her for exactly the reason some parents don't.

That's a judgment call about your kid, not a number.

What the numbers do say is that this series is unusually forgiving. Nothing in it will outrun a reader who got through book 1. They just get to hold a thicker book each time, which at six years old feels like a promotion.

Related

Sources: Lexile measures, ATOS levels, word counts, AR points, interest levels and page counts are from Renaissance Accelerated Reader BookFinder, retrieved September 16, 2026, using the English chapter-book record for each title. Series order and titles are from Penguin Random House.

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