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Books by grade

Top 20 book series for 3rd graders

A series is the quickest way to build reading stamina: once a child knows the characters, the next book is easy to start. These twenty are widely used in classrooms and libraries for ages 7 to 10. Book one is linked each time.

Titles, authors and publication details were checked against Open Library in October 2026. Age ranges and content notes are editorial judgment based on publisher and library guidance, so preview anything sensitive for your own child. Checked 2026-10-25. Nobody paid to be here. The buy links are plain search links, not affiliate links, so Peabody earns nothing from them.

  1. Magic Tree House

    Mary Pope Osborne · Ages 6-9

    Jack and Annie travel through time in a tree house. Short books with a fact-finding companion series (Fact Trackers).

    Buy: Bookshop.org · Amazon

  2. A to Z Mysteries

    Ron Roy · Ages 6-9

    Three friends solve one gentle mystery per book, starting with The Absent Author and moving through the alphabet.

    Buy: Bookshop.org · Amazon

  3. The Boxcar Children

    Gertrude Chandler Warner · Ages 6-9

    Four orphaned siblings set up home in a boxcar and then solve mysteries; more than a hundred books.

    Watch for: The first book has orphans on their own.

    Buy: Bookshop.org · Amazon

  4. Dog Man

    Dav Pilkey · Ages 6-9

    Comic-style adventures of a cop with a dog's head. Follow the order of publication.

    Watch for: Potty humor.

    Buy: Bookshop.org · Amazon

  5. The Bad Guys

    Aaron Blabey · Ages 6-9

    Reformed villains try to do good, with very little text per page.

    Watch for: Toilet humor.

    Buy: Bookshop.org · Amazon

  6. Judy Moody

    Megan McDonald · Ages 6-9

    A third grader with moods and big schemes. Short chapters and Peter H. Reynolds's illustrations.

    Buy: Bookshop.org · Amazon

  7. Ivy + Bean

    Annie Barrows · Ages 6-9

    Two very different neighbors become friends and get into trouble. About twelve books.

    Buy: Bookshop.org · Amazon

  8. Dragon Masters

    Tracey West · Ages 6-9

    Boys and girls chosen as Dragon Masters learn to bond with their dragons. Short chapters, some art.

    Buy: Bookshop.org · Amazon

  9. Cam Jansen

    David A. Adler · Ages 6-9

    A girl with a photographic memory solves mysteries by saying 'click'. Very short chapter books.

    Buy: Bookshop.org · Amazon

  10. Encyclopedia Brown

    Donald J. Sobol · Ages 7-11

    A boy detective solves cases and the reader gets the solution at the back of the book. Good for reasoning practice.

    Buy: Bookshop.org · Amazon

  11. Geronimo Stilton

    Geronimo Stilton · Ages 6-9

    A mouse newspaper editor goes on adventures in books with changing fonts and colors; popular with reluctant readers.

    Buy: Bookshop.org · Amazon

  12. The World According to Humphrey

    Betty G. Birney · Ages 6-9

    A classroom hamster narrates life in room 26 and fixes people's problems. Series of more than a dozen.

    Buy: Bookshop.org · Amazon

  13. Time Warp Trio

    Jon Scieszka · Ages 7-10

    Three boys use a magic book to time-travel and meet historical figures. Starts with Knights of the Kitchen Table.

    Buy: Bookshop.org · Amazon

  14. Stink

    Megan McDonald · Ages 6-9

    Judy Moody's little brother is the star of his own series. Starts with Stink: The Incredible Shrinking Kid.

    Buy: Bookshop.org · Amazon

  15. The 13-Storey Treehouse

    Andy Griffiths · Ages 7-11

    A treehouse that keeps growing floors for outlandish gadgets, drawn by Terry Denton. Published in the US as The 13-Story Treehouse.

    Buy: Bookshop.org · Amazon

  16. The Notebook of Doom

    Troy Cummings · Ages 6-9

    A boy keeps a notebook of monsters in his town. Short chapters with cartoon-style art.

    Buy: Bookshop.org · Amazon

  17. Clementine

    Sara Pennypacker · Ages 7-10

    Third grader Clementine and her adventures. Sold as a series of seven books.

    Buy: Bookshop.org · Amazon

  18. Ramona

    Beverly Cleary · Ages 6-10

    Ramona Quimby's growing up in eight books, beginning with Beezus and Ramona.

    Buy: Bookshop.org · Amazon

  19. Flat Stanley

    Jeff Brown · Ages 6-9

    Stanley is flattened by a bulletin board and mailed to friends. Very short.

    Buy: Bookshop.org · Amazon

  20. Diary of a Wimpy Kid

    Jeff Kinney · Ages 8-12

    Greg Heffley's diary of middle school with cartoons on most pages; the series has more than 15 books.

    Buy: Bookshop.org · Amazon

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