Has Christian undertones but is a beautiful book AND it's about ants. It's an old book and out of print but I was surprised by how deep it was. You see ants know how long they will live so the ant reflects on the purpose of life and "the beauty of the work of the creator" in the last chapters. It's also about cooperation and service.
Don't get one of those ugly reprints, get a used copy with the old school binding.