When the only way to get at a target is by using a child, MI5 bring in special agents Tom and Zilla to help.

When the son of a scientist is threatened by the Viper gang's kidnapping plot, Tom and Zilla must act as his bodyguards - without letting him know.

Can they stop the Vipers' attack? Bloomsbury High Low books encourage and support reading practice by providing gripping, age-appropriate stories for struggling and reluctant readers, those with dyslexia, or those with English as an additional language.

Printed on tinted paper and with a dyslexia friendly font, Mission Alert is aimed at readers aged 8+ and has a manageable length (72 pages) and reading age (7+).

This collection of stories can be read in any order. Produced in association with reading experts at Catch Up, a charity which aims to address underachievement caused by literacy and numeracy difficulties.