The third delightfully funny detective story and puzzle book for 6 to 8 year olds from a bestselling duo perfect for readers of the TREEHOUSE books. Ursula Dubosarsky is the Australian Children's Laureate for 2020 - 2021. It's a national emergency! A rare and extremely valuable mongoose is missing and the legendary Buenos Aires zoo is in chaos. But with rabbits in the Tigers' Taj Mahal and hippos in Panda's Palace, the zoo is a very confusing place. Coco may be the Chief of Police, but solving crimes can be very stressful. Only the calming presence of his brainy cousin Alberta can help. Can Alberta and Coco follow the clues and deduce the whereabouts of the missing mongoose? Reviews for the series include: 'a silly, zany romp aided and abetted by Terry Denton's typically playful illustrations' - Sydney's Child 'an excellent transitional book for readers starting to make their way into the unfamiliar and perhaps slightly daunting world of chapter books Dubosarsky has a truly playful way with words, which is spot on for this age group. The puzzles by Terry Denton are a lot of fun' - Bookseller + Publisher 'a touch of the Geronimo Stiltons' - Adelaide Advertiser Perfect for: - Reluctant readers with illustrations on every page - Kids who love the Treehouse or CatKid books - Young readers who love puzzle books - Includes a glossary of Spanish words and clues to help solve the puzzles.