by Israel Campos · Algar · tapa blanda · ISBN 9788498455946
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«El misterio de la fórmula robada» is the children's mystery novel by Israel Campos, published by Algar in paperback (160 pages, in Spanish).
Sandra and Pedro go to visit their aunt, owner of Matilda Cookies, and hope to attend the launch of a new cookie. When they discover that someone has stolen the secret formula and the police find no clues, Sandra, a great admirer of Sherlock Holmes, decides to investigate with her brother's help.
Volume 92 of Algar's Calcetín collection includes illustrations by Mario García Arévalo and was published in 2013.
Recommended for readers aged 9 to 12, especially those looking for mysteries and adventures with child protagonists.
