Machines of the Little People (The Eve Project, Book 1) by Tegon Maus

Compelling Sci-Fi.

About the book: Ben Harris’s sister died of cervical cancer more than three years ago… his best friend and her husband, Roger Keswick, disappeared the day before the funeral. For the next six months everyone from the local police to the Department of Defense searched for him but to no avail… it was as if he had simply fallen off the face of the planet only to reappear at work as if nothing were out of the ordinary.

Then by the purest of coincidences Ben finds himself pulled back into Roger’s life only to discover he has remarried… to Jessica… a woman the looks, sounds and acts just like his dead sister. To complicate things Roger is insistent his home, his car, his life is infested with tiny elf like creatures he calls the Katoy. He claims they run massive machines under his house and watch his every move… every move that is until Jessica is found bludgeoned to death in his living room and Roger is nowhere to found . . . again.

About Teagon Maus:  I was raised pretty much the same as everyone else... devoted mother, strict father and all the imaginary friends I could conjure. Not that I wasn't friendly, I just wasn't "people orientated". Maybe I lived in my head way more than I should have, maybe not. I liked machines more than people, at least I did until I met my wife.
The first thing I can remember writing was for her. For the life of me I can't remember what it was about... something about dust bunnies under the bed and monsters in my closet. It must have been pretty good because she married me shortly after that. I spent a good number of years after inventing games and prototypes for a variety of ideas before I got back to writing.
It wasn't a deliberate conscious thought, it was more of a stepping stone. My wife and I had joined a dream interpret group and we were encouraged to write down our dreams as they occurred. "Be as detailed as you can," we were told.
I was thrilled. If there is one thing I enjoy it's making people believe me and I like to exaggerate. Not a big exaggeration or an out right lie mine you, just a little step out of sync, just enough so you couldn't be sure if it were true or not. If I can make people think "it could happen," even for a moment, then I have them and nothing makes me happier. When I write, I always write with the effort of "it could happen" very much in mind and nothing, I guarantee you, nothing, makes me happier.

As the saying goes, it takes all sorts.

Then he disappears yet again, and proves very difficult to find, despite a lot of searching, strange appearances and prophetic dreams.