Edition of freely available e-books from CZ.NIC - administrator of national internet domain cz. These are primarily books dealing with the Internet and IT technologies by renowned Czech and foreign authors, intended for the wider (and lay) public. Electronic versions of books in PDF (or ePUB and MOBI) are available free of charge; printed versions of books can be ordered from the publisher for catalog prices. Every year 3-4 new titles are published. The CZ.NIC edition is one of the educational activities of the administrator of the Czech national domain.