Written by
Erika McGann
Illustrated by
Vince Reid
Diary Detectives

While helping with a car boot sale, Cass finds a very old diary. It talks about picking on the drama kids on the bus, and a horrible prank played  during their end-of-year show. Who wrote the diary? Can the Bubble Street Gang unmask the wicked writer?

Cass and the Bubble Street Gang Book 3

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192 pages
196x130 mm

Also available as an Electronic Book (ePub)


Book 3 in the Cass and the Bubble Street Gang series! 

Cass, Lex and Nicholas investigate crimes, solve mysteries and have brilliant adventures. They’ve even got their own secret clubhouse. 

Cass is not impressed with the new Residents' Association programme -- suddenly everyone's in Neighbourhood Watch and thinks they're a genius detective. And that’s Cass’s job!! Worse still, there are so many new rules that the kids can't even play on the street anymore. No one stops Cass and the gang from playing games - something will HAVE to be done about the Residents' Association...

But there's also a mystery afoot for the Bubble Street Gang: while helping with a car boot sale, Cass finds a very old diary. The name inside the cover has worn away, but it must belong to somebody in Berbel Street. The diary talks about picking on the drama kids on the bus, and finally about a horrible prank played on them during their end-of-year show. Who does this diary belong to? Can the Bubble Street Gang unmask the wicked writer?

Erika McGann grew up in Drogheda, County Louth, and now lives in Dublin. She is the author of a number of children’s books, including the winner of the Waverton Good Read Children’s Prize 2014, The Demon Notebook, the first in her magical series about Grace and her four friends. Other books in the series are: The Broken Spell, The Watching Wood and The Midnight Carnival. She is also the author of the ‘Cass and the Bubble Street Gang’ series.

McGann’s usual mix of hilarious dialogue and eccentric characters

Irish Examiner

great if you like mystery stories … didn’t want to put it down

Ireland’s Own
Peter Garvey, age 11

Perfect for modern day fans of Enid Blyton, with all the classic elements of a good adventure story

Parents in Touch

If the result of their investigation isn’t quite as they anticipated, the entertaining adventure makes it all worthwhile, as Cass and Co succeed in inspiring young detectives that mysteries are everywhere, just waiting for someone to solve them

Evening Echo
Pet O’Connell

filled with fun, laughs and a great mystery (or two) to solve, the third in this series is even better than the rest. An engaging story, Diary Detectives is easy to read, but still challenging as it pulls the reader along through these children’s world at a pitch-perfect, absorbing rate. You feel as if you know these people. Cass and her friends are realistically drawn and the adults in the story are seen through real children’s eyes. While there are loads of wacky episodes, there is also a strong sense of realistic, logical thought and good detective work as they work their way through another mystery. It has that sense of childhood wonder and adventure that makes it a joy to read at any age. The drawings are whimsical and lively; adding life, imagery and a strong feeling of time and place that allows the characters and the story to jump off the page. So funny, sassy and warm, you'll want to join in!

Fallen Star Stories


Gerry Kelly’s Late Lunch
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Teaching Resources: free to view and download

  • pdf-logoDownload Teaching Guides: Teaching guide to the book by Peter Heaney

Other books by this author
  • The Demon Notebook
  • The Broken Spell
  • The Watching Wood
  • The Midnight Carnival

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