Ala delta

Nico and Marga become involved in an adventure involving a gang of thieves and treasure stolen from Museo del Prado.

While Calcetines is cleaning his neighbor Enola's chimney, he finds the skeleton of a bird with a message attached to its foot that dates back to the 1940s. It was sent by Enola's love telling her where to meet him but she never received the note and was never reunited with him. Calcetines and his best friend try to discover what ever happened to Enola's long-lost suitor. Includes workbook with reading comprehension activities.

Renata and her friends learn about children around the world who do not have time to play because they have to work and try to come up with a solution to the problem.

Young Blanca decides to visit a house rumored to be haunted.

Cata's family never talked politics and now less than ever. The military has taken power in Uruguay, the government has changed and with it the lives of Uruguayans. Fabiola's grandfather, her best friend, has been imprisoned, his father has to leave the country and the girl must spend the summer with their neighbors, who prefer to remain silent on the situation. Cata and Fabiola will soon meet the need of keeping a secret and the dangers of thinking differently.

Ulises Cabal investigates the mythology of a lost underwater city.

After living with his aunts for ten years, Juan is asked to join his grandfather on a long journey, during which time he learns about importance of nature conservation.

Fifth grader Blas enjoys the adventures his unconventional teacher takes the class on as they learn about the world around them.

Bookseller Ulises Cabal encounters a number of mysterious occurrences when he visits Salamanca, a school purported to be haunted by the ghost of its founder.

Ten-year-old Nina feels nervous at the idea of seeing her grandmother, who might be senile and might need to be put in an elderly care facility, but the stories that Nina's grandmother tells Nina awakens her imagination and Nina decides she does not want her grandmother to be taken away.