Enchantress from the Stars by Sylvia Engdahl
New York, NY: Firebird (1971).
Elana and her father's team are from a culture with interstellar travel and their job is to ensure that more primitive civilizations are allowed to develop naturally. When they end up on a medieval planet being colonized by a culture with space-travel capabilities, they assist the natives in vanquishing the colonists by posing as Enchanters who know magic. Told from the point of view of all three cultures, Engdahl breaks down fantasy and science-fiction, examining how viewpoint can turn science into magic or vice-versa, bringing readers to question their own notions of genre and convention.
Feed by M.T. Anderson
Somerville, MA: Candlewick Press (2002).
On a futuristic Earth, most people have a constant Feed into their brain. Media, school, and relentless advertising are streamed through this Feed. When teen Titus meets Violet, he's immediately smitten, but becomes revolted and confused when her Feed starts malfunctioning, disabling her entire body and memory. Anderson has created an intriguing technological dystopian future, but his characters fail to bring the questioning of their technological existence to any conclusion.