Orphaned when their spy parents were killed during an operation Tom & Zilla are normally cooped up at boarding school But when the only way to get at a target is by using a child MI5 bring them in to help Mission Alert tells the story of some of their adventures; the brother & sister spy duo must dig deep to survive! Bloomsbury High Low books encourage & support reading practice by providing gripping age-appropriate stories for struggling & reluctant readers those with dyslexia or those with English as an additional language Printed on tinted paper & with a dyslexia friendly font Mission Alert is aimed at readers aged 8 & has a manageable length (72 pages) & 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 & numeracy difficulties