This collection of open problems in group theory has been published every two–four years at Novosibirsk Institute of Mathematics since 1965. Problems have been proposed by hundreds of mathematicians from all over the world, the difficulty of problems ranges from PhD level to well-known problems that remain open for decades. More than fifty years “Kourovka Notebook” serves as a unique means of communication for researchers in Group Theory and nearby fields of mathematics. Probably the most striking illustration of its success is the fact that more than three-quarters of the problems from the 1st edition of 1965 have now been solved.

The “Kourovka Notebook” is edited by

Evgeny Khukhro, University of Lincoln, UK, and Sobolev Instritute of Mathematics, Novosibirsk, khukhro@yahoo.co.uk, and

Victor Mazurov, Sobolev Instritute of Mathematics, Novosibirsk, mazurov@math.nsc.ru.