Yes! "Danny Dunn, Invisible Boy". It incorporated virtual reality with tiny flying drones for 'invisibility'. It was published in 1974. I was inspired to make

Yes! "Danny Dunn, Invisible Boy". It incorporated virtual reality with tiny flying drones for 'invisibility'. It was published in 1974. I was inspired to make a handwriting copying machine based on the "Homework Machine" book. Great series!