Consolatio vacui (joy, deligt, consolation of void) is a conceptual piece exploring the idea of void and emptiness in contrast to the concept „horror vacui,“ which is wide-spread in the subconsciousness of the west culture. The piece deals with void as a field of possibilities, as a space without which there were no particular things. These questions are examined first in general, then in the field of objects and eventually in the specific field of book, asking the questions of ways and effects of communication, relationship of sign and void, purpose of empty space in the book (and in general). The piece consists of 24 books, 99 mostly empty pages each, which symbolizes the wide field of possible consideration of the issues solved in each book on one or a few pages. The 24th book is a summary of all the ideas with commentary.