Librumdex are a closed species by me. Librumdex live in libraries and second hand book stores and they take care of the books. They are separated into different genres and sub genres. They can have two different sizes. Either very small (about 4 to 6inches big) or around human sized (between 4 feet and 7 feet). They spend a lot of their time reading and taking care of their books and each individual one can take care of up to 200 books. A book in its care goes into disrepair because they either died or a human abandoned it while it was still in their possession. Most of the time they don't tend to books that people own personally unless they have a library of at least 1000 books. They never take care of new books that have never been owned before. If one of their books is sold, they'll find a new one to replace it. A Librumdex only dies if it runs out of books to protect. Even if it has just one book to protect, it will continue to live on. A Librumdex only takes care of books with in it's genre or sub-genre. If a book falls into it's hands that is the in wrong genre, it will abandon it. Each genre of Librumdex have specific features but all of them share common physical features. A single Librumdex can not be based off of more then two genres. One that is based off of two genres is drawn to books that are based more in one then the other (I.E: A Fantasy/Horror Librumdex will collect books of both genres but will be more drawn to Fantasy books). If you're interested in getting your own, please check out their info here: http://www.furaffinity.net/journal/6956934/