Source: https://www.kidsbookseries.com/search?age=4&rl=1

Book series for 4-year-olds at reading level: 1st grade (list current as of Dec 15, 2025)

  Amelia Bedelia Foldout Books by Herman Parish (Age 3 - 6)
  Amelia Bedelia I Can Read Level 2 by Peggy Parish, Herman Parish (Age 4 - 9)
  Arthur Adventures by Marc Brown (Age 3 - 8)
  Berenstain Bears Beginner Books by Stan Berenstain, Jan Berenstain (Age 3 - 9)
  Berenstain Bears Bright and Early Books for Beginning Beginners by Stan Berenstain, Jan Berenstain (Age 2 - 8)
  Berenstain Bears Cub Club by Stan Berenstain, Jan Berenstain (Age 4 - 8)
  Berenstain Bears First First Time Books by Stan Berenstain, Jan Berenstain (Age 1 - 4)
  Berenstain Bears First Time Readers by Stan Berenstain, Jan Berenstain (Age 3 - 8)
  Berenstain Bears I Can Read Level 1 by Stan Berenstain, Jan Berenstain, Mike Berenstain (Age 4 - 8)
  Berenstain Bears Lift-the-Flap Books by Jan Berenstain, Mike Berenstain (Age 2 - 7)
  Berenstain Bears Step into Reading Step 1 by Stan Berenstain, Jan Berenstain (Age 3 - 7)
  Berenstain Bears Step into Reading Step 2 by Stan Berenstain, Jan Berenstain (Age 4 - 7)
  Biscuit Board Books by Alyssa Satin Capucilli (Age 2 - 6)
  Biscuit Lift-the-Flap Board Books by Alyssa Satin Capucilli (Age 2 - 6)
  Biscuit My First I Can Read by Alyssa Satin Capucilli (Age 3 - 7)
  Biscuit Picture Books by Alyssa Satin Capucilli (Age 2 - 6)
  Biscuit Picture Books with Activity Pages by Alyssa Satin Capucilli (Age 2 - 6)
  Brian Floca's Picture Books of Vehicles by Brian Floca (Age 2 - 10)
  Can't Do by Douglas Wood (Age 3 - 8)
  Curious George New Adventures by Margret Rey, Alan J. Shalleck, H. A. Rey, et al. (Age 3 - 8)
  Curious George Original Adventures by H. A. Rey, Margret Rey (Age 3 - 8)
  D.W. by Marc Brown (Age 3 - 8)
  D.W. 8x8 Series by Marc Brown (Age 2 - 6)
  D.W. Board Books by Marc Brown (Age 1 - 4)
  Disney Fairies Passport to Reading Level 1 by Celeste Sisler, Lucy Rosen, Jennifer Fox (Age 4 - 8)
  Don't Let the Pigeon Drive the Bus by Mo Willems (Age 2 - 8)
  Dr. Seuss Beginner Books by Dr. Seuss (Age 3 - 8)
  Dr. Seuss Beginning Beginners by Dr. Seuss (Age 1 - 5)
  Dr. Seuss Board Books by Dr. Seuss, Dr. Seuss (Age 0 - 5)
  Dr. Seuss Classics and More by Dr. Seuss, Tish Rabe, Jack Prelutsky (Age 3 and up)
  Dumb Bunnies by Dav Pilkey (Age 4 - 8)
  Elephant and Piggie by Mo Willems (Age 3 - 8)
  Eloise Ready-to-Read by Margaret McNamara, Lisa McClatchy, Ellen Weiss, et al. (Age 4 - 8)
  Fancy Nancy by Jane O'Connor (Age 4 - 8)
  Fancy Nancy 8x8 Picture Books by Jane O'Connor (Age 4 - 8)
  Fancy Nancy I Can Read Level 1 by Jane O'Connor (Age 4 - 8)
  Fancy Nancy Storybooks with Stickers by Jane O'Connor (Age 4 - 8)
  Flat Stanley I Can Read Level 2 by Jeff Brown (Age 4 - 8)
  Fly Guy by Tedd Arnold (Age 4 - 9)
  Fly Guy Picture Books by Tedd Arnold (Age 3 - 8)
  Harry the Dirty Dog by Gene Zion (Age 2 - 8)
  Henry and Mudge by Cynthia Rylant (Age 4 - 7)
  I Stink by Kate McMullan (Age 4 - 8)
  I Stink Board Books by Kate McMullan (Age 2 - 5)
  I'm Not Afraid by Dandi Daley Mackall (Age 3 - 7)
  I'm Not Afraid Board Books by Dandi Daley Mackall (Age 1 - 5)
  If You Give a Mouse by Laura Numeroff (Age 3 - 8)
  Knuffle Bunny by Mo Willems (Age 3 - 8)
  Martha Speaks Readers Level 1 by Susan Meddaugh (Age 4 - 8)
  Martha Speaks Readers Level 2 by Susan Meddaugh (Age 4 - 8)
  Nina, Nina Ballerina by Jane O'Connor (Age 4 - 7)
  Nuts by Eric Litwin (Age 3 - 7)
  Pete the Cat (original series) by Eric Litwin (Age 3 - 8)
  Pete the Cat 8x8 Picture Books by James Dean, Kimberly Dean (Age 3 - 8)
  Pete the Cat My First I Can Read by James Dean (Age 3 - 8)
  Pigeon by Mo Willems (Age 2 - 8)
  Pigeon Board Books by Mo Willems (Age 1 - 4)
  Pinkalicious 8x8 Picture Books by Victoria Kann (Age 3 - 7)
  Pinkalicious I Can Read Level 1 by Victoria Kann (Age 4 - 8)
  Poppleton by Cynthia Rylant (Age 4 - 8)
  Russell the Sheep by Rob Scotton (Age 3 - 7)
  Russell the Sheep Board Books by Rob Scotton (Age 1 - 5)
  Sam by Barbro Lindgren (Age 2 - 5)
  Splat the Cat by Rob Scotton (Age 3 - 8)
  Splat the Cat I Can Read Level 1 by Chris Strathearn, Rob Scotton, Natalie Engel, et al. (Age 4 - 8)
  Splat the Cat Lift-the-Flap Books by Rob Scotton (Age 4 - 8)
  Splat the Cat Storybooks with Stickers by Annie Auerbach, Rob Scotton, J. E. Bright (Age 4 - 8)
  Star Wars: The Clone Wars DK Readers Pre-Level 1 by Jon Richards (Age 4 - 6)
  What People Do Best by Laura Numeroff (Age 3 - 7)

Please note that reading level search results reflect our best estimate of the reading level range for each series based on the information we have available. To check or confirm the actual reading level for a specific book, specific book within a series as measured by one of the companies that perform these assessments, please go to the respective company's website as explained here: https://www.kidsbookseries.com/help/readinglevels.php.

We are in the process of adding more series to our database. Please check back again soon when we may have more series on this list for you.


Key for icons:
   = award winner or finalist
   = best-seller list
   = adapted into film or musical
   = adapted from television series
   = adapted into television series

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