Que libro les ha dejado una huella?
Hello Estefania! In the majority part of the forum we use English so as everyone can understand each other. In the #communities we use the language according to it.
Also, you may want to check the #everything-else category, there you will find topics related to what you are asking, for exemple, Talking about books and What book are you reading now. 
Edit: I see truenorth_49 was quicker 