What measures do you undertake to preserve your books and comics? After a hindsight of years, do you find that your hardcovers do in fact age slower than more affordable and hospitable paperbacks? Some publishing houses offer special signed books, sometimes with slipcases. An author sig doesn't have value with me, but it got me thinking. Would you fork out a bit more if paperbacks came out in slipcases? It's a great way to delay the page yellowisation.