28 books in series

Clifford the Big Red Dog

Clifford the Big Red Dog is a 28-book series with 28 released primary works first released in 19 with contributions by Norman Bridwell, Alison Inches, Anne-Marie Perrotta, and Tean Schultz.

Clifford Goes to Kindergarten
Clifford, the small red puppy
Clifford's Class Trip
Clifford's Good Deeds
Clifford's Birthday Party
Clifford's kitten
Clifford Visits The Hospital
Clifford, We Love You
Clifford's Word Book
Clifford to the rescue
Clifford and the grouchy neighbors
Clifford's Thanksgiving Visit
Clifford Loves Autumn
Clifford's First Snow Day
Clifford's Valentines
Oops, Clifford!
Clifford the small red puppy
Clifford's First Valentine's Day
Clifford Collection: The Original 6 Stories!
Clifford's Family
Clifford Goes to Hollywood
Clifford Barks!
Clifford and the grouchy neighbors
Clifford's Busy Week
Clifford's Halloween
Clifford the Big Red Dog
The Big Itch
Clifford Grows Up