Suitable for 7 - 9 years

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Product description

There’s something Billy Bonkers doesn’t want you to know. Come closer…I’ll whisper it: he has to wear his sister’s underpants! And whether Billy’s flying round a go-kart track, chasing a very smelly dog, or finding some priceless long-lost treasure, it’s not easy to explain: “They’re NOT MY PANTS!”

Product Details






Orchard Books

Date published

May 3rd, 2012

Lexile measure


Accelerated Reader

AR book level: 4.6; Middle years; 1.0 points



UK edition


Giles Andreae

Photo of Giles Andreae

Nick Sharratt

Photo of Nick Sharratt


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What kids think

  1. natashakrywald
    on 8 March 2013

    eally funny

  2. fellow
    on 2 February 2013

    I loved the part when he screamed” not my pants”.

  3. jessica1975
    on 2 December 2012

    its so funny when he has his sis ters under wear

  4. ladysweetnaj123
    on 30 July 2012


    4 out of 5
  5. coolcars
    on 27 May 2012

    I loved this book as it is bonkers like me. It was written with soul and passion which made me want to read on.

    5 out of 5