Running on the Cracks is award-winning writer Julia Donaldson's first novel aimed at a teenage audience.

[1] The story revolves around 15-year-old Leo, who runs away from her aunt and uncle's home, where she has been living since the sudden death of her musician parents.

Donaldson has spoken openly about how the character of Mary, who suffers from a mental illness, was inspired by the people she met while her son was in hospital.

The book was adapted by writer Andy Arnold, directed by Katie Posner and the lead role of Leo was performed by Jessica Henwick.

[5] The play received positive reviews from critics, with The Guardian describing it as "gripping",[6] The Scotsman praising the "fine performances from the five-strong cast, with Gaylie Runciman in poignant form as Mary, and Jessica Henwick outstanding as Leo",[7] and The Times giving four stars and noting the show's "edge-of-the-seat excitement of a thriller".