Alberta is the clever cousin of Coco Carlomagno, the well-respected (if somewhat easily startled) Buenos Aires Chief of Police. When Coco runs into an unusually difficult problem, he calls on Alberta to help him solve the mystery. In this case he is being haunted by a mysterious floating pineapple. Is it a ghost?

The second in a series of delightfully funny detective stories for 6 to 8 year olds and a new kind of puzzle book from a bestselling duo working together for the first time.Coco Carlomagno, the well-respected (if somewhat easily startled) Chief of Police, has run into an unusually difficult problem. From his office high in the Obelisco, Buenos Aires' tallest building, he can see a light turn off and on. Could it be a message? How can he possibly decode it? In desperation he once again calls on his clever cousin Alberta to help him solve the puzzle of the looming lamplight.

The third delightfully funny detective story and puzzle book for 6 to 8 year olds from a bestselling duo. 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?

Coco is the well-respected, if somewhat easily startled, Chief of Police in Buenos Aires. Alberta is his more sensible cousin. Together they crack the cases that confound this puzzling city. Coco Carlomagno is trying to avert a national disaster. La Bella Cucharita, the highly strung world-famous opera singer, is due to make her return to the stage after an unfortunate nerve-wracking incident - but a strange message has her rattled. Who on earth would send La Bella Cucharita mysterious notes on the eve of such an eagerly awaited performance? Luckily Coco is on the case, and with a little help from his logic-loving cousin Alberta, he can discover just who is behind the quivering quavers.