Hello! I sneaked into the pages of this book -uninvited, of course-, because I like crosswords and quizzes, as long as they don't include... cats. The exercises were created while playing by Leonidas, Margarita, Vangelis, and Angela, the quadruplets of Mr. Giannis and Mrs. Nelli, who have finished the 4th grade. Now, how these exercises became a book is a story you will learn by flipping through it.