What genre of books includes the Latin root for lifeplus?

The Latin root for "lifeplus" would be a combination of roots, most likely *vita* (life) and something indicating "more" or "plus," such as *plus* itself or a word implying increase or addition. There isn't a single, established Latin root that directly translates to "lifeplus."

Therefore, no single genre of books would *exclusively* contain this combination. However, genres that frequently deal with themes related to extending life, improving life, or enhanced capabilities would likely incorporate such concepts, possibly via neologisms or metaphorical language incorporating these roots:

* Science Fiction: This genre often explores themes of extending lifespan, technological enhancements, and post-humanism, making it a likely candidate for works that might incorporate concepts related to "lifeplus."

* Fantasy: Similar to sci-fi, fantasy often explores immortality, magical enhancements, and extended lifespans, although usually through supernatural means.

* Utopian/Dystopian Fiction: These genres often explore societies that have radically altered human life, either for the better or worse, potentially including elements of life extension or enhancement.

In short, while no genre is defined by the direct use of a Latin "lifeplus" root, genres exploring enhanced or extended life would be most likely to conceptually deal with its meaning.