Just in case anyone ends up here, the book I was thinking of turns out to be the rather obscure novel "Intruder" by Charbonneau from 1979. More info on the boo

Just in case anyone ends up here, the book I was thinking of turns out to be the rather obscure novel "Intruder" by Charbonneau from 1979. More info on the book: https://www.kirkusreviews.com/book-reviews/louis-charbonneau-2/intruder/ https://www.kirkusreviews.com/book-reviews/louis-charbonneau...