Tea and Aliens; no way to run an alien invasion - Bureau of Alien Interactions

The Ur network neutralizes space and time. Without warning, it connects with Nolan, whose life is about to need alien intervention. Since the network puts everything at zero distance from everything else, there are a lot of aliens, -- and they are much too close by.  All of them are different.  And all of them have different problems -which have now become Nolan's problems. Our hero, with his new love, Fiona, wind up in charge of an intergalactic nexus.
which is a house in a quiet little suburb. Unfortunately, terrestrial biology is not compatible with alien body chemistries.  Even worse, alien technology is not compatible with terrestrial technology. Nolan and Fiona have the job of keeping those chemistries and those technologies separated. It is not helpful that various  earlier visitations, over millennia, have left some peculiar artifacts on this planet.
These have to be found and returned. Or, at least, shut down. Is it all a Government secret?No, Earth Governments are trying desperately not to know anything about this.