Le Plus Grand détective du monde French reader by Jean-François Martin. How many kids want to be a great detective? Gilou Serin is the greatest detective in the world. It is simple - no case is too hard for him, he finds everything. One day, a new client - his mother - proposes an investigation - the vase on the salon table has disappeared. The culprit can not have gone far... Paperback, 33 pages.