for some reason it did not work, I decided to change the name of the string and there it worked very well now....
Could it be because the string name had capital letters?
before: ("The_Life_of_Alixenus_the_Great," The Life ^^ of ^^ Alixenus the Great")
now: ("libro_4_titulo," The Life ^^ of ^^ Alixenus the Great")
Thanks friend for the code, it's great ... a hug