From the publisher's blurb:
Peregrine is a lost world to be found out on the Fringe. This supplement features all the details of the fantastic creatures and dangers that wait explorers of this strange new world.
As a special bonus with the Infinite Creatures series, each creature comes with their own unique Fringe world (thus allowing for a wider range of environments than are currently cataloged in the populated worlds of the Fringe.) Of course, this in no way means these creatures must be used with this new world, or that they must be used in the Fringe setting. This new Origin World is a way of introducing strange and otherworldly sci-fi creatures into a campaign with as little need for work from the Gamemaster to make that happen. These oddities come with a world readymade to receive them, a world that can be plopped down into any Infinite Futures or space campaign.