Idea: A Where's Waldo/Wally book where Waldo/Wally gets extremely popular in-universe so there's ads and people dressing as him everywhere and you have to find the one calm spot of good that doesn't have him plastered all over it. Call it Where Isn't Waldo?
@BatElite Sorta like that one Where's Waldo In The Land Of Waldos page, from The Great Waldo Search (1989)?
@gaditb If "Real Waldo" is a thing in that image then I'm going with hardest in existence. :P
@BatElite I believe Real Waldo is missing a shoe...