What type of literature can a Jehovah Witness read? Any suggestion etc. novels, books, magazine.?

Hello! Im a Jehovah witness in training and well i was wondering what type of literature would be fine for a 18 year old. I suggest literature as novels and I want to know what tyoe of genre can i read and what not to read. Also i want to know what type of stuff do i have to avoid! please and thank you :)
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