<p>I'm trying to recall my reasoning, and I think it was mostly just "this smells fishy", but some of the things that went through my head were... why is the non-popup book published in 2000 and the popup one in 1984?  Which was the original?  If the pop-up one was the original, why is its title "X pop-up" rather than just "X"?  Wouldn't a popup book have different artistic contributors than a non-popup? etc etc.<br></p>