Undercover Kid Tuna Surprise - All Aboard Mystery Readers Author:Ronald Kidd Eight-year-old Maggie Murphy loves mysteries. When she discovers her grandfather’s special aging machine, Maggie realizes she has the ultimate disguise—she can solve mysteries as a grown-up! Unfortunately, Maggie’s not the only one who’s learned her grandfather’s secret. Now she must work with her younger brother Arthur to solve the cas... more »e of the missing tuna— quickly, before time runs out and the Undercover Kids are uncovered again!« less