Onion O'Brien is in trouble, again. This time he and the rest of the Five O's are trying to stop the destruction of the Valley, the local wasteland where they hang out. But Mayor Ronald Bump has other ideas - he wants to build new apartments there, so he sets local guards The Ferg and Judge on the children.

As if things aren't bad enough, there's a new teacher in their school acting very suspiciously. The Five O's can find out his secret if they manage to win the school talent contest. There's only one problem - they are completely talentless.

Then there's the discovery of the head of Ned Belly, and the local legend that claims he can reveal where his treasure is hidden ...

Will the Five O's manage to outwit The Ferg and Judge ... and Ronald Bump ... and the new teacher ... and solve the mystery of the head of Ned Belly ... and save their precious Valley?!

There are 272 pages in this book. This book was published 2019 by Gill .

Jason Byrne is one of Ireland's most popular comedians and a judge on Virgin Media One's Ireland's Got Talent. He has a huge international career as a stand-up comedian and many television credits to his name. Oisin McGann is a writer and illustrator who has produced dozens of books, including Headbomz: Wreckin' Yer Head, the Mad Grandad series and The Forbidden Files. Oisin McGann has worked extensively in creative media, first as freelance designer and illustrator in the publishing and design industry, and later as a background designer on the animated series 'Zorro'. During a spell at an advertising agency, he expanded into copywriting.