Posted on April 17, 2008 by Erica FirmentAn Engineer’s Guide to Cats This is an excellent study of the many aspects of cats. I, for one, regularly check my cat’s depth, as it often changes depending on the shedding season, and sometimes I loose my cellphone in the fur. Related posts: Another Extremely Accurate Librarian Costume. The Librarian Avengers Film Rating System The Librarian Tales from the Reference Desk