When COVID-19 hits New York, a recently fired executive who now makes deliveries ends up making deliveries to a certain person who recognizes his (nerdy) skills and asks him to join the 'non-profit' KPS. It is only later that he learn what KPS means, and it's there in the title. Indeed, the society moves its members to an alternate earth where Kaiju exists. The KPS is there to study them and to make sure they are safe from the monsters from our world.
I decided to read this novel based on the title and the premise, but ended up enjoying it. What starts out sounding ludicrous ends up being a really fun, breezy novel to read, where most characters treat each other with respect while putting up with horrible puns and Kaiju in-jokes. The science is, of course, hand-wavy, but in the context of the novel, it works and there are no obvious 'McGuffins' introduced. Of course, there are bad guys, and you can tell there are bad guys because they don't treat others with respect, nor do they understand what it means to really make a Kaiju angry.
If you're looking for a fun (and funny) novel to pass the time, this one may be a nice choice.