Order of Book Series
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Mary Pope Osborne Books in Order

Mary Pope Osborne has written 166 books, published between 1982 and 2025. The first book is Run, Run, As Fast As You Can (1982) and the newest is Sea Otter Sunrise (2025). Publication order is the reading order below.

Books
166
Published
1982–2025
Confirmed
43 of 166 titles
Pages on record
11,767 in 112 of 166 books
Reading time
196–294 hours

Reading time is an estimate, not a recorded figure: 11,767 pages at 300 words a page, read at 200–300 words a minute, covering the 112 of 166 titles with a page count on record.

See all 166 books in order Printable Mary Pope Osborne checklist
Photo of Mary Pope Osborne, author

Mary Pope Osborne, born May 20, 1949, is an American children's author and audiobook narrator best known for the Magic Tree House series, which had sold more than 134 million copies worldwide by 2017. Awards have gone to both the series and Osborne, including recognition for work promoting children's literacy. Osborne attended the University of North Carolina and published a first book in 1982. The catalogue counts 166 Osborne books, from Run, Run, As Fast As You Can (1982) to Sea Otter Sunrise (2025). Time travel, tree houses, history, folklore and Greek mythology appear among the subjects.

The Merlin Missions continue Mary Pope Osborne's Magic Tree House series, following siblings Jack and Annie on quests set by the wizard Merlin across different eras and cultures.

How many Mary Pope Osborne books are there?

Mary Pope Osborne has 166 books, released between 1982 and 2025. They include 7 series and 36 titles listed outside any series.

Mary Pope Osborne Books in Publication Order

The table lists all 166 Mary Pope Osborne books in the order they were published, with the release year, the page count where one is on record, and how many independent book listings confirm each title. Catalogue data as of September 2026.

  1. Cover of Run, Run, As Fast As You Can by Mary Pope Osborne (1982)
  2. Cover of Mo to the Rescue by Mary Pope Osborne (1985)
  3. Cover of The Story of Christopher Columbus by Mary Pope Osborne (1987)
  4. Cover of Pandora's Box by Mary Pope Osborne (1987)
  5. Cover of Moonhorse by Mary Pope Osborne (1988)
  6. Cover of Jason and the Argonauts by Mary Pope Osborne (1988)
  7. Cover of A Visit to Sleep's House by Mary Pope Osborne (1989)
  8. Cover of Mo and His Friends by Mary Pope Osborne (1989)
  9. Cover of American Tall Tales by Mary Pope Osborne (1991)
  10. Cover of George Washington by Mary Pope Osborne (1991)
  11. Cover of Beauty and the Beast by Mary Pope Osborne (1991)
  12. Cover of Dinosaurs Before Dark / Valley of the Dinosaurs by Mary Pope Osborne, book 1 of the Magic Tree House series (1992)
  13. Cover of Spider Kane and the Mystery at Jumbo Nightcrawler's by Mary Pope Osborne, book 2 of the Spider Kane series (1993)
  14. Cover of The Knight at Dawn / Castle of Mystery by Mary Pope Osborne, book 2 of the Magic Tree House series (1993)
  15. Cover of Mummies in the Morning / Secret of the Pyramid by Mary Pope Osborne, book 3 of the Magic Tree House series (1993)
  16. Cover of Pirates Past Noon / Pirates' Treasure! by Mary Pope Osborne, book 4 of the Magic Tree House series (1994)
  17. Cover of Night of the Ninjas by Mary Pope Osborne, book 5 of the Magic Tree House series (1994)
  18. Cover of Haunted Waters by Mary Pope Osborne (1994)
  19. Cover of Afternoon on the Amazon by Mary Pope Osborne, book 6 of the Magic Tree House series (1995)
  20. Cover of One World, Many Religions by Mary Pope Osborne (1996)
  21. Cover of Sunset of the Sabertooth / Mammoth to the Rescue by Mary Pope Osborne, book 7 of the Magic Tree House series (1996)
  22. Cover of Midnight on the Moon / Moon Mission! by Mary Pope Osborne, book 8 of the Magic Tree House series (1996)
  23. Cover of Ghost Town at Sundown / A Wild West Ride by Mary Pope Osborne, book 10 of the Magic Tree House series (1997)
  24. Cover of Rocking Horse Christmas by Mary Pope Osborne (1997)
  1. 1
    Run, Run, As Fast As You Can1982 · 156 pages · confirmed 2/4
    1982156
    Buy at Amazon USAmazon UK
  2. 2
    Love Always, Blue1983 · confirmed 2/4
    1983–
    Buy at Amazon USAmazon UK
  3. 3
    Best Wishes, Joe Brady1984 · 192 pages · confirmed 2/4
    1984192
    Buy at Amazon USAmazon UK
  4. 4
    Mo to the Rescue1985 · 1 pages · confirmed 2/4
    19851
    Buy at Amazon USAmazon UK
  5. 5
    Last One Home1986 · confirmed 2/4
    1986–
    Buy at Amazon USAmazon UK
  6. 6
    The Story of Christopher Columbus1987 · 90 pages · confirmed 2/4
    198790
    Buy at Amazon USAmazon UK
  7. 7
    Pandora's Box1987 · 30 pages · confirmed 2/4
    198730
    Buy at Amazon USAmazon UK
  8. 8
    The Deadly Power of Medusa1988 · confirmed 2/4
    1988–
    Buy at Amazon USAmazon UK
  9. 9
    Moonhorse1988 · 40 pages · confirmed 2/4
    198840
    Buy at Amazon USAmazon UK
  10. 10
    Jason and the Argonauts1988 · confirmed 2/4
    1988–
    Buy at Amazon USAmazon UK
  11. 11
    A Visit to Sleep's House1989 · 24 pages · confirmed 2/4
    198924
    Buy at Amazon USAmazon UK
  12. 12
    Mo and His Friends1989 · 48 pages · confirmed 2/4
    198948
    Buy at Amazon USAmazon UK
  13. 13
    American Tall Tales1991 · 115 pages · confirmed 2/4
    1991115
    Buy at Amazon USAmazon UK
  14. 14
    George Washington1991 · 117 pages · confirmed 2/4
    1991117
    Buy at Amazon USAmazon UK
  15. 15
    Beauty and the Beast1991 · 40 pages · confirmed 2/4
    199140
    Buy at Amazon USAmazon UK
  16. 16
    Dinosaurs Before Dark / Valley of the DinosaursMagic Tree House #11992 · 68 pages · confirmed 3/4
    199268
    Buy at Amazon USAmazon UK
  17. 17
    Spider Kane and the Mystery Under the May-AppleSpider Kane #11992 · confirmed 2/4
    1992–
    Buy at Amazon USAmazon UK
  18. 18
    Spider Kane and the Mystery at Jumbo Nightcrawler'sSpider Kane #21993 · 142 pages · confirmed 2/4
    1993142
    Buy at Amazon USAmazon UK
  19. 19
    The Knight at Dawn / Castle of MysteryMagic Tree House #21993 · 66 pages · confirmed 2/4
    199366
    Buy at Amazon USAmazon UK
  20. 20
    Mummies in the Morning / Secret of the PyramidMagic Tree House #31993 · 64 pages · confirmed 3/4
    199364
    Buy at Amazon USAmazon UK
  21. 21
    Pirates Past Noon / Pirates' Treasure!Magic Tree House #41994 · 67 pages · confirmed 3/4
    199467
    Buy at Amazon USAmazon UK
  22. 22
    Night of the NinjasMagic Tree House #51994 · 68 pages · confirmed 3/4
    199468
    Buy at Amazon USAmazon UK
  23. 23
    Molly and the Prince1994 · confirmed 2/4
    1994–
    Buy at Amazon USAmazon UK
  24. 24
    Haunted Waters1994 · confirmed 2/4
    1994–
    Buy at Amazon USAmazon UK
  25. 25
    Afternoon on the AmazonMagic Tree House #61995 · 67 pages · confirmed 2/4
    199567
    Buy at Amazon USAmazon UK
  26. 26
    One World, Many Religions1996 · 86 pages · confirmed 2/4
    199686
    Buy at Amazon USAmazon UK
  27. 27
    Sunset of the Sabertooth / Mammoth to the RescueMagic Tree House #71996 · 67 pages · confirmed 2/4
    199667
    Buy at Amazon USAmazon UK
  28. 28
    Midnight on the Moon / Moon Mission!Magic Tree House #81996 · 75 pages · confirmed 3/4
    199675
    Buy at Amazon USAmazon UK
  29. 29
    Dolphins at DaybreakMagic Tree House #91996 · confirmed 3/4
    1996–
    Buy at Amazon USAmazon UK
  30. 30
    Ghost Town at Sundown / A Wild West RideMagic Tree House #101997 · 73 pages · confirmed 3/4
    199773
    Buy at Amazon USAmazon UK

Mary Pope Osborne series and characters in order

Each link below opens a reading-order page with every book in publication order.

Mary Pope Osborne books grouped by series

Each title below is a row in the publication-order table above. A group whose heading is a link has its own reading-order page; the other groups have no page of their own on this site.

Magic Tree House Fact Tracker in order

44 books
  1. 1. Dinosaurs
  2. 2. Knights and Castles
  3. 3. Mummies and Pyramids
  4. 4. Pirates
  5. 5. Rain Forests
  6. 6. Space
  7. 7. Titanic
  8. 8. Twisters and Other Terrible Storms
  9. 9. Dolphins and Sharks
  10. 10. Ancient Greece and the Olympics
  11. 11. American Revolution
  12. 12. Sabertooths and the Ice Age
  13. and 32 more in the table above

Magic Tree House books in order

40 books by Mary Pope Osborne
  1. 1. Dinosaurs Before Dark / Valley of the Dinosaurs
  2. 2. The Knight at Dawn / Castle of Mystery
  3. 3. Mummies in the Morning / Secret of the Pyramid
  4. 4. Pirates Past Noon / Pirates' Treasure!
  5. 5. Night of the Ninjas
  6. 6. Afternoon on the Amazon
  7. 7. Sunset of the Sabertooth / Mammoth to the Rescue
  8. 8. Midnight on the Moon / Moon Mission!
  9. 9. Dolphins at Daybreak
  10. 10. Ghost Town at Sundown / A Wild West Ride
  11. 11. Lions at Lunchtime / Lions on the Loose
  12. 12. Vacation Under the Volcano / Racing with Gladiators
  13. and 28 more in the table above

Tales From The Odyssey in order

6 books
  1. 1. The One-Eyed Giant
  2. 2. The Land of the Dead
  3. 3. Sirens and Sea Monsters
  4. 4. The Gray-Eyed Goddess
  5. 5. Return to Ithaca
  6. 6. The Final Battle

Magic Tree House Non-Fiction

5 books

5 titles published under this heading without a numbered place in a series.

My America: Virginia's Civil War Diary in order

3 books
  1. 1. My Brother's Keeper
  2. 2. After the Rain
  3. 3. A Time to Dance

Spider Kane in order

2 books
  1. 1. Spider Kane and the Mystery Under the May-Apple
  2. 2. Spider Kane and the Mystery at Jumbo Nightcrawler's

Dear America in order

2 books
  1. 9. Standing in the Light: The Captive Diary of Catharine Carey Logan, Delaware Valley, Pennsylvania, 1763
  2. 19. My Secret War: The World War II Diary of Madeline Beck, Long Island, New York 1941

Magic Tree House Super Edition in order

1 book
  1. 1. Danger in the Darkest Hour / World at War, 1944

Standalone books

36 books

36 Mary Pope Osborne titles here are not listed as part of any series.

Do you have to read Mary Pope Osborne books in order?

You only need to read Mary Pope Osborne books in order within each series: the books listed here span 7 separate series, and each series has its own publication order.

Where to start with Mary Pope Osborne

Start with the first book of the Mary Pope Osborne series you want to read: Magic Tree House Merlin Missions starts with Christmas in Camelot (2001) and Magic Tree House starts with Dinosaurs Before Dark / Valley of the Dinosaurs (1992). The earliest catalogued title overall is Run, Run, As Fast As You Can (1982).

What is the newest Mary Pope Osborne book?

Sea Otter Sunrise (2025) is the newest Mary Pope Osborne book released so far.

Is there a new Mary Pope Osborne book coming?

No next Mary Pope Osborne book is announced in the catalogue, which is a gap in the listings it merges rather than a sign that the run has ended.

Mary Pope Osborne at a glance

Still publishing
Mary Pope Osborne published a book as recently as 2025.
Release pace
Mary Pope Osborne books have appeared more than one a year on average.
Length
11,767 pages across the 112 of 166 books with a recorded length, a median of 112 pages each.
Busiest decade
Most Mary Pope Osborne books, 60 of 166, were published in the 2000s.

What the Mary Pope Osborne books are about

152 of the 166 Mary Pope Osborne books carry subject tags in Open Library's catalogue. The subjects below are the ones that recur across them, most frequent first: magic is tagged on 56 of 152. The subjects are cataloguers’ headings, not a plot summary.