It's nearly impossible to narrow it down to just one title, but Detective in certainly one that should be seriously considered! From the magnificent per hero covers by Flessel, O' Mealia and Guardineer to the iconic early Batman covers of 29, 31 & 35, to the introduction of the first sidekick in comics, to all of the artists who followed with great Batman covers, there's a LARGE body of great work there!!! Below, in order, are covers by Flessel, Guardineer, Kane and a Kane/Robinson cover collaboration. I don't own those iconic issues and I don't post books from other sites that I don't own, but we all know those images.