Le secret très secret du maître du secret (“The highly secret secret of the master of secrets”) is a children’s book by Vincent Pianina, who designed and illustrated it. Pianina chose Futura for the texts and Ouroboros for the titles. This latter typeface is sometimes used in combination with illustrations in a series of playful compositions. For instance, on the back cover, Ouroboros’ question mark is filled with different scenes. Some other small texts were written by Pianina using his own lettering, such as his name on the front cover of the book.