They could try to communicate with it using code. For instance, if there are characters who are skilled in programming, they might send messages in binary or a special programming language to the Love Machine in an attempt to understand its functions and motives.
It depends. In some niche circles that are interested in the intersection of technology and love stories, 'love machine novels' might be quite popular. However, in the general market, they may not be as well - known as more traditional love stories or mainstream science - fiction novels.
A 'love machine novel' could be a novel that involves a machine in the context of love. Maybe it's about a love story where a machine plays a crucial role, like a robot that falls in love or a device that helps people find love.
I'm not sure specifically as I haven't read it. It could be about a machine that has something to do with love, perhaps a machine that creates or facilitates love in some way.
It could be about a robot falling in love with a human. Maybe the robot is designed to assist a person, and during their interactions, it develops emotions that are similar to love.