A thriller with lots of humour and suspense . . . A very accessible and exciting book for younger readers
Writeaway!
Racy thriller . . . Her characters are credible and the pace is kept up throughout . . . Some exciting twists and turns will keep the reader guessing
Daily Telegraph
An exciting thriller, with code-breaking schoolgirl detectives
Guardian
A sparkling read
Sunday Tribune
Clever and surprising. That's what makes it so brilliant
- Olivia, aged 9, Sunday Express