Need magic but audience is a crew of logical positivists - let's call it psi, apply some handwaving, and slip it in under the radar. Sounds awful but it's exact

Need magic but audience is a crew of logical positivists - let's call it psi, apply some handwaving, and slip it in under the radar. Sounds awful but it's exactly the same as every other "advanced technology" in the genre really. Books with psi by forgotten writers that are interesting (to me): Stapleton's 'Odd John' and May's 'Intervention'.