The 9 Lives of Alfred Merchen: The Secret of Oppenheimer

Santiago and Sofía could never have guessed that their school break would turn into a dangerous adventure. The two siblings must decode the hidden clues in the nine lives of their mysterious grandfather to be able to rescue their kidnapped parents. And find the family heirloom that governments and criminals have tried to steal for decades! Will they outsmart the unknown and powerful enemy they have to face? Will they save their family on time? Find out in the first book of this incredible series!