Poznan [1928]. Published by St. Adalbert's Bookstore. 14x22 cm, pp. XII, 424, numerous black and white illustrations in the text, publisher's hardcover. Good condition (owner's signature, cracks on the coversticks, stains and scuffs on the cover).
The second collection of mathematical anecdotes and riddles, after Lîlâvatî, compiled by Eng. Szczepan Jeleński.