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 a billionaire businessman builds a private island which seems to jam government satellites, Tom and Zilla must convince his son to invite them for a visit.

Can they figure out what's happening on Island X? 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 CatchUp, a charity which aims to address underachievement caused by literacy and numeracy difficulties.