"El caso del grito en la sala de profesores"

The book that I read to see this is a collection of adventure and mystery, this book is great fun, tells the story of four friends who have a dog, that makes a club detectibes, which is called "charly & Company." In this book, what happens is reaching a new conserge to school and start having some disappearances that nobody has done, Fede, Charly, Estefi, Rabanito and percioso (the dog) are trying to discover the culpabre, they believe which has been the new consergee, but then the kids change their minds to discover that the culprit who is least expected ...