"I Used to Know That" is an ideal and accessible reference manual for adults who wish to refresh their knowledge or prepare for quizzes. It includes forgotten elements from our school years, covering interesting topics such as the capital of Chile, the basics of osmosis, solving a factorial equation, as well as well-known poetic references.

With 192 pages and dimensions of 12.9x12.9cm, this book is an excellent source of knowledge that will captivate readers and surely become a topic of discussion around many tables.