I am putting the final few touches to my next book, Jamie and the Joke Factory, but I could still do with a few more jokes! Can you (or, better still, your children or grandchildren) help out?

Send me their favourite ‘doctor, doctor’, ‘I say, I say, I say’ or ‘knock, knock’ joke by Monday (21st September) and I’ll do my best to fit them in. If I put their joke in the book, I’ll put their name in too!

You can put your joke in the comments box below, send it via my facebook page (Peta Rainford’s Books), or via email: petarainford @gmail.com.