Ruling Regarding Reading or Writing Fictional Stories
Response: Fictional stories are from lies which occupy the time of the writer and the reader without benefit, so abandoning busying oneself with them is preferable. And if writing and reading [fictional stories] occupies oneself from that which is obligatory then this [fictional stories] is prohibited. And if it occupies oneself from that which is recommended then this [fictional stories] is disliked. In any case, the time of the Muslim is valuable, so it is not permissible to spend it in that which there is no benefit.
Shaykh Saalih al-Fowzaan
ad-Durar an-Naadhirah fil-Fataaawa al-Mu'aasirah - Pages 644-645
al-Fowzaan - ad-Da'wah 1516, Jumaada al-Oolaa 1416AH