GM Additional Note:<br/><br/>The books went flying, but finally, Feybin came upon a book that did not fly off the shelf so easily.  Indeed, it did not fly off the shelf at all.  Feybin pulled it, but it did not dislodge.  However, if you tilted it upwards, it unhinged some secret lock that opened the bookshelf, revealing the top of a set of stairs that descended down into some sort of basement.