First, I should check if the author is indeed Alex Rovira Álvarez. Wait, I know that "Las palabras que curan" is actually written by Alejandro Jodorowsky's collaborator Alex Rovira. But maybe in some sources, Álvarez is part of the name. I need to confirm the correct author's name. Let me think... Oh, maybe it's a typo. The correct name might be Alex Rovira. Let me verify that.