Magic Tree House Reading Level: Every Book, Lexile and ATOS

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Straight to it.

The original Magic Tree House books, 1 through 28, run Lexile 380L to 590L and ATOS 2.6 to 3.5.

Renaissance puts every single one at interest level K to 3. Every single one is worth exactly 1.0 AR point.

They run 65 to 74 pages and 4,517 to 6,367 words.

Twenty-eight books. Eleven years. And the whole series fits inside one grade level.

I'm Jimmy Vee. I write funny picture books and I've performed for kids for thirty years, so I'm in this database constantly. Everything here comes from Renaissance Accelerated Reader BookFinder, the same one your school's AR program uses.

Magic Tree House reading levels, books 1 to 28

# Title Year Lexile ATOS Words Pages
1 Dinosaurs Before Dark 1992 510L 2.6 4,737 68
2 The Knight at Dawn 1993 490L 2.9 5,340 66
3 Mummies in the Morning 1993 500L 2.7 5,105 65
4 Pirates Past Noon 1994 480L 2.8 5,324 67
5 Night of the Ninjas 1995 490L 2.7 5,428 69
6 Afternoon on the Amazon 1995 510L 2.6 4,517 67
7 Sunset of the Sabertooth 1996 520L 3.0 4,926 68
8 Midnight on the Moon 1996 480L 2.8 5,683 70
9 Dolphins at Daybreak 1996 540L 3.1 4,663 67
10 Ghost Town at Sundown 1997 510L 3.0 6,367 73
11 Lions at Lunchtime 1998 510L 3.0 5,313 70
12 Polar Bears Past Bedtime 1997 570L 3.3 5,724 74
13 Vacation Under the Volcano 1998 410L 3.3 5,833 74
14 Day of the Dragon King 1998 380L 3.3 5,607 68
15 Viking Ships at Sunrise 1998 560L 3.3 5,502 71
16 Hour of the Olympics 1998 380L 3.3 5,086 70
17 Tonight on the Titanic 1999 550L 3.1 5,301 70
18 Buffalo Before Breakfast 1999 560L 3.3 5,579 72
19 Tigers at Twilight 1999 510L 3.0 5,136 72
20 Dingoes at Dinnertime 2000 540L 3.2 5,530 71
21 Civil War on Sunday 2000 570L 3.4 5,991 74
22 Revolutionary War on Wednesday 2000 580L 3.5 5,041 69
23 Twister on Tuesday 2001 540L 3.2 5,127 70
24 Earthquake in the Early Morning 2001 560L 3.3 5,882 72
25 Stage Fright on a Summer Night 2002 560L 3.3 6,219 70
26 Good Morning, Gorillas 2002 510L 3.3 6,129 71
27 Thanksgiving on Thursday 2002 590L 3.3 6,131 73
28 High Tide in Hawaii 2003 570L 3.4 6,222 73

Those are the original chapter books by Mary Pope Osborne. That qualifier is about to matter a lot.

Three different things are all called Magic Tree House

This is where the confusion starts. Give me thirty seconds and you'll never be confused again.

The original chapter books, 1 to 28. Mary Pope Osborne, 1992 to 2003. The table up there. Jack and Annie, about 70 pages, black and white pictures.

Merlin Missions, originally numbered 29 to 55. Then republished as Merlin Missions 1 to 27.

Same books. Two different numbers. Depends which printing is in your hand. Longer, pitched a little older.

Fact Trackers. The nonfiction companions, with their own numbering. A Fact Tracker 20 is not chapter book 20. Their levels run a lot higher, because nonfiction prose always measures higher than story prose.

And now graphic novel adaptations. These are the trap.

They're adapted by Jenny Laird. Not Osborne.

They carry their own measures. The graphic novel of Mummies in the Morning is ATOS 2.3 where the chapter book is 2.7, and Renaissance files them under different interest levels entirely.

So here's your shortcut. Check the author. Osborne means chapter book. Laird means graphic novel. That one habit will save you from every wrong number on the internet about this series.

Twenty-eight books and it barely moves

Eleven years of writing.

ATOS goes from 2.6 to 3.5. That's it.

And every book is 1.0 AR point. Every single one. I have never seen a series hold that steady.

And the Lexile numbers wander around with no regard for what order they were written in:

  • Easiest: books 14 and 16, Day of the Dragon King and Hour of the Olympics, both 380L
  • Hardest: book 27, Thanksgiving on Thursday, 590L

Book 14 is easier than book 1. Book 27 is harder than book 22. There's no ramp. There was never a ramp.

What does change is length. A little.

First ten books average about 5,200 words. Last ten average about 5,700.

So they get longer without getting harder. Stamina goes up, difficulty doesn't. Your reader finishes more book and never hits a wall.

The practical version: a kid who can read book 1 can read all 28. Read them in order for Jack and Annie, not for the level.

What the number can't tell you

Reading level tells you whether a child can decode the words. That's the whole job.

It says nothing about whether a seven-year-old is ready for what's in the book. Or whether they'll care.

Magic Tree House works for the same reason Dog Man does.

Seventy pages and real chapters feel like a real book to a kid who just left picture books behind. Five thousand words at ATOS 3 keeps it finishable.

Feels big. Reads fast.

That gap is the design. It's the entire reason a nervous reader picks up book 2.

If you're choosing for a kid who's not sure they're a reader yet, that matters more than anything in that table.

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. Several Spanish editions share an AR quiz number with the English book but carry different measures; those were not used.

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