More themes introduced in Your Face Tomorrow - Will they ever be resolved?

Nearing the end of  volume one of Javiar Marias's trilogy, Your Face Tomorrow, we encounter a chapter in which the narrator, Deza, believes he's being followed as he walks home from the "unnamed building" through the rainy London streets and parks by a woman w/ a dog. Could be - but if he is being followed, by whom? Could be someone from the British spy office for which Deza works, as they're always checking up on one another; or it could be from an agency from another nation, or perhaps from one of the many people whom the agency as angered either by refusing a request for aid and support or by support for some sort of rival faction. The main point, I think, is that a life in the field of espionage is made up of countless moments of fear and paranoia - or is it exactly paranoia if the fears are well founded? Another element Marias introduces has to do w/ the lives of celebrities and public figures, with Deza's boss at the agency unfurling a long and complex theory that these people fear a violent death because the don't want the arc of their life story to be, in the public mind, forever associated with an unsavory demise: a robbery, shooting, OD, etc. As w/ just about every other plot line introduced so far in this novel, these themes come to no fruition or point of crisis, at least not in this volume; no doubt you have to read all 3 volumes to ties the strands together, if that ever even happens. I may someday read volumes 2 and 3, but not right away. It's a provocative novel that seems like it must be close to reality - the reality of the life of a spy deep in the bureaucracy, the opposite of a James Bond hero - but does it really merit 1,000 pp?