Looking for a book about a group of strangers lost together

Some specifications I want are:

Strangers working together while still being suspicious of each other.

There's one person in the group whom everyone agrees is bad news or might stab them in the back later.

They are lost in a weird place.

They are hunted by something or someone
(not a human).

No romance whatsoever! Just strangers bonding and forming deep friendships.

Everyone still remains in contact with each other after the adventure is over.