Public opinion poll concerning some English novels

This questionnaire is about different book-features.
The results will be used in my Master Thesis about "Age Suitability" at the University of Konstanz.

The questionnaire contains 14 questions.
The following 15 books will be examined:

THE WHOLE QUESTIONNAIRE IS ABOUT THE ENGLISH VERSION OF EACH BOOK!
Please don't worry if you haven't read all the books.
You can just answer the questions about the books you have read.
No user data are collected or necessary. You are completely anonymous!
The questionnaire is only for research.
You can stop answering the questions whenever you want to.
You are not contractually committed.
Pressing on the "Continue"-Button will lead you to the questionnaire. Thank you in advance for your participation.