Clouds blowing swirls of wind, gentlemen with fin-de-siècle mustaches, finely dressed generals with elaborate headpieces — such are the lost-in-time characters depicted in "An Entrance to Mention: the Park Pardon Principles," a 52-page book about a fictional park and its inhabitants that Dutch illustrators Bloeme van Bon and Geran Knol created together in 2014. Last year Knol and van Bon began turning the characters into one-of-a-kind papier-mâché masks, and today they've launched the latest edition in the ongoing (and consistently sold-out) series.