This book / catalogue is an anthology of the books collected after the installation “The Questions Library” is shown. What all the books have in common, is that all of them have a question as a title. The books are classified according to the type of question, and not the content. Time questions, space, situation, yes / no, quantity and causality. In the course of the show the inventory is constantly expanding, as visitors have the chance to donate books to the library. This is a piece which is in process at all times. The catalogue can be read as if it was a novel, all titles are ordered in a logical way. One question questions the next. By now the library has 554 books. Until now there are two volumes.