A certain class of books is defined as follows: (1) the book was kept for years in a cafe or mathematics library; (2) the primary contents are research problems and comments, handwritten by resident and visiting mathematicians; (3) the book still exists. Examples include the [Lwów and Wrocław Scottish Books](http://kielich.amu.edu.pl/Stefan_Banach/e-duda.html) in Poland and the Boneyard Book in the University of Illinois Archives. What are some others?



Communal problem books
The math library in Utrecht, the Netherlands, has such a book.


