Book: girl with a prototype computer in her head that allows her brain to be broken into multiple personalities
115249
Story involving young female space travelling escapee with multiple personalities
79207
YA novel about sister is alien with two hearts and assassins come
55991
Book where human thoughts are affecting the universe
145982
Novel where a genius child secretly makes clones of himself
124495
90s (or earlier) book/novel: daily memory loss and a device called the Memory
134855
Short story about a girl who lost/replaced her personality
113264
Book about an AI that traps people on a spaceship
111015
Book about a boy that enters a medieval fantasy PC computer game
110960
ID a book about a mirror world and 4th dimension
8593
Book trilogy about twins in a walled city where people are sorted by intelligence
84468
Short story where a character moves through dimensions via mental exercises
163
Book where girl is raised in history museum to believe she as actually part of the time period her exhibit is based on
102969
Science fiction novel with the title "T" (which is also the name of the protagonist)
63631
Book featuring a child learning from a crowdsourced AI book
16133
If I upload my brain into a computer is it still me?
142811
Short story where people can swap minds with others
74443
YA Time travel/teleportation novel. Plot required using helmet (or other head gear)