A little dedication goes a long way.

That's why Catriona Robinson, the country's favourite children's author, always dedicated her books to those who touched her life the most - not least Emily, her reclusive granddaughter.

Emily never thought too much about these dedications. But when Catriona dies unexpectedly, each one becomes a cryptic clue in a breadcrumb trail that apparently leads to her lost, unpublished manuscript.

It's a mystery only Emily can solve. But to do so she will have to walk in her grandmother's footsteps, into the wider world she's spent her whole life hiding away from . . .