Billie has taken the new girl at school under her wing. She'll teach her the important stuff - Biscuit Laws, Mrs Patterson and of course where to sneakily eat a Jaffa Cake. She might even get invited to the EVENT OF THE YEAR (Billie's mums' are getting married).
But then suspicion sets in. The new girl seems VERY close to Billie's best friend Layla.
And she knows a LOT about the big school heist - the theft of Mrs Robinson's purse. But, Billie is on to her. Well, as long as Patrick doesn't catch her eating biscuits first.
Join Billie in this laugh-out-loud adventure!
A sparky, funny new series perfect for fans of Diary of A Wimpy Kid - Daily Mail
Jen Carney knows how to make kids laugh . . . and I mean totally unreserved roll-on-the-floor belly laugh. Billie Upton Green is a firm favourite in our house - Emma Mylrea, author of Curse of the Dearmad

The third hilarious accidental diary from Billie Upton Green (don't call her BUG!)
"Ideal for fans of Tom Gates, or Pamela Butchart's books . . . a wonderful new series" - The Week Junior
"Fun, funny, inclusive and warm-hearted, these books are pure, cheery joy" - Sophie Anderson
There's an exciting addition to the Upton Green family (and it's not whatever Mr Paws has left on the living room carpet. . .).
But getting a new little sister isn't nearly as straightforward as Billie expects. Why are there so many rules? It's been weeks and weeks, and she still hasn't been able to hold the baby up at Show & Tell.
Luckily, the school musical is in full swing, giving Billie the perfect distraction. She just needs to watch out for Painy Janey, who has her eyes on the main part and doesn't care what gets in her way. . .