Sep 14, - 7 Excellent YA Sci-Fi Romance Series. The Delirium series by Lauren Oliver: Delirium, Pandemonium, and Requiem. The Jenna Fox Chronicles series by Mary E. The Chemical Garden Trilogy by Lauren DeStefano: Wither, Fever, and Sever. The Across the Universe series by Beth Revis: Across the Universe, A Million Suns, and. Some of the most exciting science fiction and fantasy stories are happening in young adult fiction. From Justina Ireland's undead Civil War alternate history.