Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | Cross My Heart | 2001 | Sandra Byrd | Buy |
| 2 | Make a Wish | 2001 | Sandra Byrd | Buy |
| 3 | Just Between Friends | 2001 | Sandra Byrd | Buy |
| 4 | Take a Bow | 2001 | Sandra Byrd | Buy |
| 5 | Change of Heart | 2002 | Sandra Byrd | Buy |
| 6 | Pass It On | 2002 | Sandra Byrd | Buy |
| 7 | Take a Chance | 2002 | Sandra Byrd | Buy |
| 8 | One Plus One | 2002 | Sandra Byrd | Buy |
Hidden Diary is an eight-book children’s series by Sandra Byrd about two friends who share a secret diary. The series begins with Cross My Heart (2001) and follows the girls through everyday adventures involving school, family, and friendship.
Published across 2001 and 2002, all eight books were released in quick succession. The series appeals to middle-grade readers who enjoy stories about friendship, secrets, and growing up with faith as a foundation.