Wir unterhielten uns einmal dariiber, daB man sich in einer fremden
Sprache nur unfrei ausdriicken kann und im Zweifelsfall lieber das sagt,
was man richtig und einwandfrei zu sagen hofft, als das, was man
eigentlich sagen will. Molnar nickte bestatigend: "Es ist sehr traurig",
resiimierte er. "Ich habe oft mitten im Satz meine Weltanschauung andem
miissen . . . " Friedrich Torberg, Die Tante Jolesch The last two
decades have witnessed great progress in the theory of translation
planes. Being interested in, and having worked a little on this subject,
I felt the need to clarify for myself what had been happening in this
area of mathematics. Thus I lectured about it for several semesters and,
at the same time, I wrote what is now this book. It is my very personal
view of the story, which means that I selected mainly those topics I had
touched upon in my own investigations. Thus finite translation planes
are the main the of the book. Infinite translation planes, however, are
not completely disregarded. As all theory aims at the mastering of the
examples, these play a central role in this book. I believe that this
fact will be welcomed by many people. However, it is not a beginner's
book of geometry. It presupposes consider- able knowledge of projective
planes and algebra, especially group theory. The books by Gorenstein,
Hughes and Piper, Huppert, Passman, and Pickert mentioned in the
bibliography will help to fill any gaps the reader may have.