I Know You Did It by Sue Wallman (author) (UK edition)

Suitable for 12 - 16 years

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Product description

‘I Know You Did It is a fantastic, gripping crime thriller from Sue Wallman which never lets up in pace and excitement – young readers will tear through its pages.’ BookTrust There’s a killer at Ruby’s new school.It’s Ruby. On her first day at a new school, Ruby finds a note in her locker saying “I KNOW YOU DID IT”. She’s terrified that someone has found out she was responsible for the death of a girl called Hannah in a playground when they were both toddlers – a secret that has haunted her for years. When first one, then two students are found dead, it looks like Ruby is being framed by another killer. Or, she might be next.

  • One of the UK’s top teen thriller writers, Sue Wallman is the award-winning author of Lying About Last Summer and Dead Popular
  • Perfect for fans of Karen McManus, Holly Jackson, and We Were Liars
  • This novel was voted winner of the Grampion Children’s Book Award 2021

Our May 2021 Teen Book of the Month

Finally, for my May Teen Book of the Month I have chosen I Know You Did It. This tells the story of our protagonist Ruby who joins a new school, but there’s a killer at this school. The twist is – the killer is Ruby. However on her first day someone leaves a note in her locker saying “I Know You Did It” – just like on the amazing front cover. When students start turning up dead, it’s up to Ruby to clear her name, and save herself from being the next victim.

Author Sue Wallman’s debut Lying About Last Summer was a phenomenon upon its release and won the Zoella Book Club prize, and still continues to be a bestselling favourite to this day. Her whodunit mysteries are packed with twists and turns that leave you guessing up until the very last page. I Know You Did It is perfect for fans of Karen McManus and Holly Jackson.

Wallman is a secondary school librarian which makes her the perfect author for teen thrillers. She knows first-hand exactly what teenagers talk and think about, and what goes on in the different social circles within school. Not only that, but she also knows exactly what books teens are interested in and looking for that aren’t already out there. All in all, this makes Wallman’s books some of the most authentic, realistic and entertaining books in the YA market at the minute.

Su – Book Club Editor, Ages 7–11+
Su – Book Club Editor, Ages 7–11+

Product Details





Date published

May 6th, 2021

Accelerated Reader

AR book level: 4.8; Middle years plus; 11.0 points

Other details

  • 352 pages



UK edition

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