Themes: Life Lessons, Values, Identity, Good vs. Evil, Temptation, Science Fiction, Fiction, Teen, Young Adult, Chapter Book, Hi-Lo, Hi-Lo Books, Hi-Lo Solutions, High-Low Books, Hi-Low Books, ELL, EL, ESL, Struggling Learner, Struggling Reader, Special Education, SPED, Newcomers, Reading, Learning, Education, Educational, Educational Books. Home from college for the summer, Jean and Jared find disturbing changes in the tiny community of Warm Springs. Something suspicious is going on in HybriGene's top-secret laboratory. The twins make it their business to solve the mystery. Written specifically for struggling readers to explore genres, like mysteries and science fiction, these fast-paced books hold student interest until the last page. Questions at the end of each title promote cognitive development by making students think about vocabulary, comprehension, character, and plot.