Chandra K. Clarke’s 2020 Echoes of Another: A Novel of the Near Future is, as the subtitle suggests, a near-future novel.
Ambitious researcher Kel has turned off-the-shelf technology into a useful experimental device that records brain states. More importantly, it can induce those states, once recorded. The ever-so-focused Kel does not consider any uses for her invention aside from the very specific one she had in mind when she created it.
Others will be more creative.