Károly Bárd has not only built and continues to build a lasting foundation for our
 profession, but always writes in a comprehensible, smooth and interesting way. As
 he put it in the retrospective interview: “I truly believe that it is possible to write
 plainly about complex professional issues without lowering the standards of the
 text. To me, the highest form of recognition is when the layperson enjoys reading
 my work, even though he doesn’t quite understand it.” I hope that both the wider
 readership will enjoy and understand, or not fully understand but read this book,
 and the professionals will rifle through the pages of these two volumes with great
 satisfaction. But above all, I hope that our most important reader, Karoly Bard will
 receive this volume with as much pleasure as it gave us putting it together for him.
 Frankfurt am Main, 7 May 2021