In Double Trouble style, tiny Ruby and big sister Nina face a cookie mystery. Seven cookies are in the jar, then the jar is empty. Everyone blames Ruby, but she says it is not her. The sisters become detectives, follow a crumb trail to the sunny garden, and find Dad sharing cookies with small birds. Dad says the birds are hungry. Ruby forgives him, and the family bakes more cookies and cleans up
This is a Level 5 book on Lavender Island: 11-page stories with feelings, weather and "can/can't". It is narrated, and each word lights up as it is read aloud. In the app your child can read it, listen to it, record their own voice and take a short quiz — earning up to three stars for their crow.
Included in Class Readers Premium. Selected books are free to try.
Four ways to enjoy this story
Read
Every word ready to help.
Read to me
Listen while each word lights up.
Record me
Read aloud, then play it back.
Quiz
No mistakes wins a star.
Watch the read-along video
Questions about The Great Cookie Mystery
Is "The Great Cookie Mystery" free to read?
"The Great Cookie Mystery" is part of Class Readers Premium, which unlocks every book on all 12 levels. Selected books are free to try.
What reading level is "The Great Cookie Mystery"?
It is a Level 5 book on Lavender Island in the Class Readers Reading Sky: 11-page stories with feelings, weather and "can/can't".
How does read-along work in "The Great Cookie Mystery"?
This book is narrated. On narrated pages each word lights up as it is spoken, karaoke style. Your child can also record their own reading and finish with a short quiz.
What age is "The Great Cookie Mystery" for?
Level 5 books suit children who are building confidence, usually around ages 5–8, including children learning English as a second language. Choose by reading ability rather than age.





