Plot Summary: "Rainbow's End - A Novel with One Foot in the Future", by Vernor Vinge

"The novel introduces us to Robert Gu, a man slowly recovering from Alzheimer's disease thanks to advances in medical technology. As his faculties return, Robert (who always has been slightly technophobic) must adapt to a very different world, where almost every object is networked and mediated-reality technology is commonplace. Robert, formerly a world-renowned poet but with a notoriously mean-spirited personality, must also learn how to change and how to rebuild relationships with his estranged family. At the same time, Robert and his granddaughter Miri are drawn into a complex plot involving a traitorous intelligence officer, an intellect of frightening (and possibly superhuman) competence hiding behind an avatar of an anthropomorphic rabbit, and ominous new mind control technology with profound implications." Wikipedia