I need help with choosing comics to buy.

I live in Sweden and we don't get much comic 图书 from America here but I have found a website that Imports a few titles for a reasonable price.

So I need some tips on what 图书 from DC to get.

I have these books:
Superman: Earth On

And this book I have ordered:
Batman: The Killing Joke

So do 你 have any suggestions?